Abstract

We demonstrate a broadband terahertz amplifier based on ultrafast gain switching in a quantum cascade laser. A heterogeneous active region is processed into a coupled cavity metal-metal waveguide device and provides broadband terahertz gain that allows achieving an amplification bandwidth of more than 500 GHz. The temporal and spectral evolution of a terahertz seed pulse, which is generated in an integrated emitter section, is presented and an amplification factor of 21 dB is reached. Furthermore, the quantum cascade amplifier emission spectrum of the emerging sub-nanosecond terahertz pulse train is measured by time-domain spectroscopy and reveals discrete modes between 2.14 and 2.68 THz.

© 2015 Optical Society of America

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References

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  8. D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
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    [Crossref]
  17. Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
    [Crossref]
  18. C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
    [Crossref]
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    [Crossref]
  20. O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
    [Crossref]
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    [Crossref] [PubMed]
  22. M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer, “Gain and losses in THz quantum cascade laser with metal-metal waveguide,” Opt. Express 19(2), 733–738 (2011).
    [Crossref] [PubMed]
  23. J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
    [Crossref] [PubMed]
  24. A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
    [Crossref]
  25. H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
    [Crossref]
  26. J. Kröll, J. Darmo, and K. Unterrainer, “Metallic wave-impedance matching layers for broadband terahertz optical systems,” Opt. Express 15(11), 6552–6560 (2007).
    [Crossref] [PubMed]
  27. M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer, “Subwavelength micropillar array terahertz lasers,” Opt. Express 22(1), 274–282 (2014).
    [Crossref] [PubMed]
  28. D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
    [Crossref]
  29. M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
    [Crossref]
  30. N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
    [Crossref]

2014 (8)

M. Rösch, G. Scalari, M. Beck, and J. Faist, “Octave-spanning semiconductor laser,” Nat. Photonics 9(1), 42–47 (2014).
[Crossref]

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer, “Subwavelength micropillar array terahertz lasers,” Opt. Express 22(1), 274–282 (2014).
[Crossref] [PubMed]

2012 (3)

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

2011 (5)

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer, “Gain and losses in THz quantum cascade laser with metal-metal waveguide,” Opt. Express 19(2), 733–738 (2011).
[Crossref] [PubMed]

J. A. Fülöp, L. Pálfalvi, M. C. Hoffmann, and J. Hebling, “Towards generation of mJ-level ultrashort THz pulses by optical rectification,” Opt. Express 19(16), 15090–15097 (2011).
[Crossref] [PubMed]

2010 (3)

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
[Crossref]

J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

2009 (1)

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

2008 (2)

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

2007 (3)

J. Kröll, J. Darmo, and K. Unterrainer, “Metallic wave-impedance matching layers for broadband terahertz optical systems,” Opt. Express 15(11), 6552–6560 (2007).
[Crossref] [PubMed]

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

2005 (1)

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

1994 (1)

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

1990 (1)

1988 (1)

T. Saitoh and T. Mukai, “Recent Progress in Semiconductor Laser Amplifiers,” J. Lightwave Technol. 6(11), 1656–1664 (1988).
[Crossref]

1983 (1)

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Allen, M. G.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Amanti, M. I.

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

Andrews, A. M.

Armijo, J.

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Austerer, M.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Bachmann, D.

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

Barbieri, S.

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Bartalini, S.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Bartolini, P.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Beck, M.

M. Rösch, G. Scalari, M. Beck, and J. Faist, “Octave-spanning semiconductor laser,” Nat. Photonics 9(1), 42–47 (2014).
[Crossref]

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

Beere, H. E.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Beltram, F.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Benea Chelmus, I. C.

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

Bonzon, C.

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

Brandstetter, M.

Brewer, A.

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

Burghoff, D.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Cai, X.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
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Calligaro, M.

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
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L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Capasso, F.

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

Castellano, F.

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

Cavalié, P.

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

Chan, C. W. I.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Cho, A. Y.

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
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Cockburn, J. W.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
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L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
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Darmo, J.

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
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M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer, “Gain and losses in THz quantum cascade laser with metal-metal waveguide,” Opt. Express 19(2), 733–738 (2011).
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M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
[Crossref]

J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

J. Kröll, J. Darmo, and K. Unterrainer, “Metallic wave-impedance matching layers for broadband terahertz optical systems,” Opt. Express 15(11), 6552–6560 (2007).
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Davies, A. G.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

De Natale, P.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Dean, P.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

Degl’Innocenti, R.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Detz, H.

Deutsch, C.

Dhillon, S.

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Dhillon, S. S.

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

Dietze, D.

J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
[Crossref]

Duerr, G.

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Exter, M.

Faist, J.

M. Rösch, G. Scalari, M. Beck, and J. Faist, “Octave-spanning semiconductor laser,” Nat. Photonics 9(1), 42–47 (2014).
[Crossref]

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

Fattinger, C.

Fenner, D. B.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Filloux, P.

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Freeman, J. R.

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

Fülöp, J. A.

Gao, J.-R.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Geiser, M.

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

Gellie, P.

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

Göbel, O.

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Gornik, E.

M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
[Crossref]

Green, R. P.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Grischkowsky, D.

Habermeier, H.-U.

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Hahn, T.

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

Hameau, S.

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Han, N.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Hasegawa, N.

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

Hayton, D. J.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Hebling, J.

Hekmat, N.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Hensley, J. M.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Hoffmann, M. C.

Hu, Q.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Hutchinson, A. L.

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

Ibrahim, M. S. M.

Jessop, D. S.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Jukam, N.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Kamboj, V.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Kao, T.-Y.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Keiding, S.

Khanna, S. P.

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

Klang, P.

Klimont, A.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Krall, M.

M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer, “Subwavelength micropillar array terahertz lasers,” Opt. Express 22(1), 274–282 (2014).
[Crossref] [PubMed]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

Kreß, M.

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

Kröll, J.

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

J. Kröll, J. Darmo, and K. Unterrainer, “Metallic wave-impedance matching layers for broadband terahertz optical systems,” Opt. Express 15(11), 6552–6560 (2007).
[Crossref] [PubMed]

Krysa, A. B.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Kuhl, J.

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Li, L.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Linfield, E. H.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

Löffler, T.

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

Lübke, K.

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Madéo, J.

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

Mahler, L.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Mangeney, J.

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

Manquest, C.

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

Marcadet, X.

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

Markmann, S.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Martl, M.

M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer, “Gain and losses in THz quantum cascade laser with metal-metal waveguide,” Opt. Express 19(2), 733–738 (2011).
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M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
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J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

Maussang, K.

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

Maysonnave, J.

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

Mohandas, R. A.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Mukai, T.

T. Saitoh and T. Mukai, “Recent Progress in Semiconductor Laser Amplifiers,” J. Lightwave Technol. 6(11), 1656–1664 (1988).
[Crossref]

Müller, T.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Nong, H.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Ohtani, K.

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
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Oustinov, D.

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

Pal, S.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Pálfalvi, L.

Parz, W.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Perger, A.

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Ravaro, M.

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

Ren, Y.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Reno, J. L.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Ritchie, D. A.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Roberts, J. S.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Rösch, M.

M. Rösch, G. Scalari, M. Beck, and J. Faist, “Octave-spanning semiconductor laser,” Nat. Photonics 9(1), 42–47 (2014).
[Crossref]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

Roskos, H. G.

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

Rungsawang, R.

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

Saitoh, T.

T. Saitoh and T. Mukai, “Recent Progress in Semiconductor Laser Amplifiers,” J. Lightwave Technol. 6(11), 1656–1664 (1988).
[Crossref]

Santarelli, G.

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

Scalari, G.

M. Rösch, G. Scalari, M. Beck, and J. Faist, “Octave-spanning semiconductor laser,” Nat. Photonics 9(1), 42–47 (2014).
[Crossref]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
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Schrenk, W.

Shah, Y. D.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Sirmons, N.

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Sirtori, C.

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

Sivco, D. L.

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

Steenson, D. P.

Strasser, G.

M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer, “Subwavelength micropillar array terahertz lasers,” Opt. Express 22(1), 274–282 (2014).
[Crossref] [PubMed]

M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer, “Gain and losses in THz quantum cascade laser with metal-metal waveguide,” Opt. Express 19(2), 733–738 (2011).
[Crossref] [PubMed]

J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Taschin, A.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Thomson, M.

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

Tignon, J.

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

J. Maysonnave, N. Jukam, M. S. M. Ibrahim, K. Maussang, J. Madéo, P. Cavalié, P. Dean, S. P. Khanna, D. P. Steenson, E. H. Linfield, A. G. Davies, J. Tignon, and S. S. Dhillon, “Integrated injection seeded terahertz source and amplifier for time-domain spectroscopy,” Opt. Lett. 37(4), 731–733 (2012).
[Crossref] [PubMed]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Torre, R.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Tredicucci, A.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Turcinková, D.

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

Unterrainer, K.

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer, “Subwavelength micropillar array terahertz lasers,” Opt. Express 22(1), 274–282 (2014).
[Crossref] [PubMed]

M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer, “Gain and losses in THz quantum cascade laser with metal-metal waveguide,” Opt. Express 19(2), 733–738 (2011).
[Crossref] [PubMed]

M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
[Crossref]

J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

J. Kröll, J. Darmo, and K. Unterrainer, “Metallic wave-impedance matching layers for broadband terahertz optical systems,” Opt. Express 15(11), 6552–6560 (2007).
[Crossref] [PubMed]

Veith, G.

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

Vitiello, M. S.

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

Wallis, R.

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

Wieck, A. D.

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

Wilson, L. R.

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

Xu, J.

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

Yang, Y.

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

Zhao, Z.-Y.

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

Appl. Phys. Lett. (11)

W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts, “Ultrafast probing of light-matter interaction in a midinfrared quantum cascade laser,” Appl. Phys. Lett. 93(9), 091105 (2008).
[Crossref]

J. R. Freeman, J. Maysonnave, N. Jukam, P. Cavalié, K. Maussang, H. E. Beere, D. A. Ritchie, J. Mangeney, S. S. Dhillon, and J. Tignon, “Direct intensity sampling of a modelocked terahertz quantum cascade laser,” Appl. Phys. Lett. 101(18), 181115 (2012).
[Crossref]

D. Turčinková, G. Scalari, F. Castellano, M. I. Amanti, M. Beck, and J. Faist, “Ultra-broadband heterogeneous quantum cascade laser emitting from 2.2 to 3.2 THz,” Appl. Phys. Lett. 99(19), 191104 (2011).
[Crossref]

J. Xu, J. M. Hensley, D. B. Fenner, R. P. Green, L. Mahler, A. Tredicucci, M. G. Allen, F. Beltram, H. E. Beere, and D. A. Ritchie, “Tunable terahertz quantum cascade lasers with an external cavity,” Appl. Phys. Lett. 91(12), 121104 (2007).
[Crossref]

R. Rungsawang, N. Jukam, J. Maysonnave, P. Cavalié, J. Madéo, D. Oustinov, S. S. Dhillon, J. Tignon, P. Gellie, C. Sirtori, S. Barbieri, H. E. Beere, and D. A. Ritchie, “Gain enhancement in a terahertz quantum cascade laser with parylene antireflection coatings,” Appl. Phys. Lett. 98(10), 101102 (2011).
[Crossref]

Y. Ren, R. Wallis, Y. D. Shah, D. S. Jessop, R. Degl’Innocenti, A. Klimont, V. Kamboj, H. E. Beere, and D. A. Ritchie, “Single mode terahertz quantum cascade amplifier,” Appl. Phys. Lett. 105(14), 141102 (2014).
[Crossref]

C. Bonzon, I. C. Benea Chelmus, K. Ohtani, M. Geiser, M. Beck, and J. Faist, “Integrated patch and slot array antenna for terahertz quantum cascade lasers at 4.7 THz,” Appl. Phys. Lett. 104(16), 161102 (2014).
[Crossref]

O. Göbel, G. Veith, J. Kuhl, H.-U. Habermeier, K. Lübke, and A. Perger, “Direct gain modulation of a semiconductor laser by a GaAs picosecond optoelectronic switch,” Appl. Phys. Lett. 42(1), 25–27 (1983).
[Crossref]

A. Brewer, J. R. Freeman, P. Cavalié, J. Maysonnave, J. Tignon, S. S. Dhillon, H. E. Beere, and D. A. Ritchie, “Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics,” Appl. Phys. Lett. 104(8), 081107 (2014).
[Crossref]

H. Nong, S. Pal, S. Markmann, N. Hekmat, R. A. Mohandas, P. Dean, L. Li, E. H. Linfield, A. G. Davies, A. D. Wieck, and N. Jukam, “Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes,” Appl. Phys. Lett. 105(11), 111113 (2014).
[Crossref]

D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo, “Spectral gain profile of a multi-stack terahertz quantum cascade laser,” Appl. Phys. Lett. 105(18), 181118 (2014).
[Crossref]

IEEE J. Sel. Top. Quantum Electron. (1)

N. Jukam, S. Dhillon, Z.-Y. Zhao, G. Duerr, J. Armijo, N. Sirmons, S. Hameau, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, and J. Tignon, “Gain Measurements of THz Quantum Cascade Lasers using THz Time-Domain Spectroscopy,” IEEE J. Sel. Top. Quantum Electron. 14(2), 436–442 (2008).
[Crossref]

IEICE Tech. Rep. (1)

J. Darmo, M. Martl, D. Dietze, G. Strasser, and K. Unterrainer, “Key components of terahertz remote sensing system,” IEICE Tech. Rep. 110(342), 77–81 (2010).

J. Appl. Phys. (1)

M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik, “Terahertz waveguide emitter with subwavelength confinement,” J. Appl. Phys. 107(1), 013110 (2010).
[Crossref]

J. Lightwave Technol. (1)

T. Saitoh and T. Mukai, “Recent Progress in Semiconductor Laser Amplifiers,” J. Lightwave Technol. 6(11), 1656–1664 (1988).
[Crossref]

J. Opt. Soc. Am. B (1)

Nat. Commun. (2)

L. Consolino, A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello, and P. De Natale, “Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers,” Nat. Commun. 3, 1040 (2012).
[Crossref] [PubMed]

D. Oustinov, N. Jukam, R. Rungsawang, J. Madéo, S. Barbieri, P. Filloux, C. Sirtori, X. Marcadet, J. Tignon, and S. S. Dhillon, “Phase seeding of a terahertz quantum cascade laser,” Nat. Commun. 1(6), 1–6 (2010).
[Crossref] [PubMed]

Nat. Photonics (4)

M. Rösch, G. Scalari, M. Beck, and J. Faist, “Octave-spanning semiconductor laser,” Nat. Photonics 9(1), 42–47 (2014).
[Crossref]

D. Burghoff, T.-Y. Kao, N. Han, C. W. I. Chan, X. Cai, Y. Yang, D. J. Hayton, J.-R. Gao, J. L. Reno, and Q. Hu, “Terahertz laser frequency combs,” Nat. Photonics 8(6), 462–467 (2014).
[Crossref]

S. Barbieri, M. Ravaro, P. Gellie, G. Santarelli, C. Manquest, C. Sirtori, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis,” Nat. Photonics 5(5), 306–313 (2011).
[Crossref]

N. Jukam, S. S. Dhillon, D. Oustinov, J. Madéo, C. Manquest, S. Barbieri, C. Sirtori, S. P. Khanna, E. H. Linfield, A. G. Davies, and J. Tignon, “Terahertz amplifier based on gain switching in a quantum cascade laser,” Nat. Photonics 3(12), 715–719 (2009).
[Crossref]

Nature (1)

J. Kröll, J. Darmo, S. S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori, and K. Unterrainer, “Phase-resolved measurements of stimulated emission in a laser,” Nature 449(7163), 698–701 (2007).
[Crossref] [PubMed]

Opt. Express (4)

Opt. Lett. (1)

Science (1)

J. Faist, F. Capasso, D. L. Sivco, C. Sirtori, A. L. Hutchinson, and A. Y. Cho, “Quantum cascade laser,” Science 264(5158), 553–556 (1994).
[Crossref] [PubMed]

Semicond. Sci. Technol. (1)

T. Löffler, M. Kreß, M. Thomson, T. Hahn, N. Hasegawa, and H. G. Roskos, “Comparative performance of terahertz emitters in amplifier-laser-based systems,” Semicond. Sci. Technol. 20(7), S134–S141 (2005).
[Crossref]

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Figures (5)

Fig. 1
Fig. 1

Realization of the broadband QCL based THz amplifier. (a) Schematic of the experimental setup. A Ti:Sapphire based TDS setup is used to generate phase-locked THz seed pulses in the emitter section of a coupled cavity QCL device and to coherently detect the THz electric field emerging from the QC amplifier section. Synchronized sub-nanosecond RF pulses, generated from a part of the fs laser beam, are injected into the QC amplifier section to achieve amplification of the THz seed by ultrafast gain switching. (b) Sketch of the coupled cavity metal-metal QCL device with attached silicon lens. (c) Time trace of a typical RF pulse measured at the output of the power amplifier across a 50 Ω load.

Fig. 2
Fig. 2

(a) QC amplifier THz electric field output for the three operating modes OFF, QCL and AMP. The inset shows the light-current-voltage characteristic of the QC amplifier section, acquired under quasi-DC bias conditions (10 kHz, 10% duty cycle), and the employed operating modes. All measurements were performed at a heat-sink temperature of 10 K. (b) Temporal shape of the RF gain switching pulse with the relative timing to the THz pulse train.

Fig. 3
Fig. 3

Temporal and spectral evolution of the THz round-trip pulses after 3 (a,b) and 15 (c,d) passes through the QC amplifier section. It displays the phase-resolved electric field amplitude (a,c) and the power spectral density (b,d) for the three selected modes OFF (red lines), QCL (orange lines) and AMP (blue lines). The spectra were calculated using a 9 ps long Hamming window.

Fig. 4
Fig. 4

Normalized spectra of the sampled THz pulses in the OFF (AMP) mode after a single pass (15 passes) through the QC amplifier section. The shaded area represents the spectral region with net amplification.

Fig. 5
Fig. 5

High-resolution (2.5 GHz) intensity spectra, obtained from 400 ps long TDS traces with the QC amplifier driven in the OFF and AMP mode. The individual modes are spaced by the free spectral range of the QC amplifier waveguide (~21 GHz).

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