Abstract

Terahertz (THz) wave generation based on nonlinear frequency conversion is a promising method for realizing a tunable monochromatic high-power THz-wave source. Unfortunately, many nonlinear crystals have strong absorption in the THz frequency region. This limits efficient and widely tunable THz-wave generation. The Cherenkov phase-matching method is one of the most promising techniques for overcoming these problems. Here, we propose a prism-coupled Cherenkov phase-matching (PCC-PM) method, in which a prism with a suitable refractive index at THz frequencies is coupled to a nonlinear crystal. This has the following advantages. Many crystals can be used as THz-wave emitters; the phase-matching condition inside the crystal does not have to be observed; the absorption of the crystal does not prevent efficient generation of radiation; and pump sources with arbitrary wavelengths can be employed. Here we demonstrate PCC-PM THz-wave generation using the organic crystal 4-dimethylamino-N-metyl-4-stilbazolium tosylate (DAST) and a Si prism coupler. We obtain THz-wave radiation with tunability of approximately 0.1 to 10 THz and with no deep absorption features resulting from the absorption spectrum of the crystal. The obtained spectra did not depend on the pump wavelength in the range 1300 to 1450 nm. This simple technique shows promise for generating THz radiation using a wide variety of nonlinear crystals.

© 2010 OSA

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  1. G. D. Boyd, T. J. Bridges, C. K. N. Patel, and E. Buehler, “Phase-matched submillimeter wave generation by difference-frequency mixing in ZnGeP2,” Appl. Phys. Lett. 21(11), 553–555 (1972).
    [CrossRef]
  2. W. Shi, Y. J. Ding, N. Fernelius, and K. Vodopyanov, “Efficient, tunable, and coherent 0.18-5.27-THz source based on GaSe crystal,” Opt. Lett. 27(16), 1454–1456 (2002).
    [CrossRef]
  3. T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
    [CrossRef]
  4. K. Kawase, H. Minamide, K. Imai, J. Shikata, and H. Ito, “Injection-seeded terahertz-wave parametric generator with wide tenability,” Appl. Phys. Lett. 80(2), 195–197 (2002).
    [CrossRef]
  5. Y. Avetisyan, Y. Sasaki, and H. Ito, “Analysis of THz-wave surface-emitted difference-frequency generation in periodically poled lithium niobate waveguide,” Appl. Phys. B 73, 511–514 (2001).
  6. D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
    [CrossRef]
  7. D. A. Kleinman and D. H. Auston, “Theory of electro-optic shock radiation in nonlinear optical media,” IEEE J. Quantum Electron. 20(8), 964–970 (1984).
    [CrossRef]
  8. J. Hebling, G. Almasi, I. Kozma, and J. Kuhl, “Velocity matching by pulse front tilting for large area THz-pulse generation,” Opt. Express 10(21), 1161–1166 (2002).
    [PubMed]
  9. J. K. Wahlstrand and R. Merlin, “Cherenkov radiation emitted by ultrafast laser pulses and the generation of coherent polaritons,” Phys. Rev. B 68(5), 054301 (2003).
    [CrossRef]
  10. K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
    [CrossRef]
  11. S. B. Bodrov, A. N. Stepanov, M. I. Bakunov, B. V. Shishkin, I. E. Ilyakov, and R. A. Akhmedzhanov, “Highly efficient optical-to-terahertz conversion in a sandwich structure with LiNbO3 core,” Opt. Express 17(3), 1871–1879 (2009).
    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  13. T. Shibuya, T. Tsutsui, K. Suizu, T. Akiba, and K. Kawase, “Efficient Cherenkov-Type Phase-Matched Widely Tunable Terahertz-Wave Generation via an Optimized Pump Beam Shape,” Appl. Phys. Express 2, 032302 (2009).
    [CrossRef]
  14. K. Suizu, K. Koketsu, T. Shibuya, T. Tsutsui, T. Akiba, and K. Kawase, “Extremely frequency-widened terahertz wave generation using Cherenkov-type radiation,” Opt. Express 17(8), 6676–6681 (2009).
    [CrossRef] [PubMed]
  15. K. Suizu, T. Tsutsui, T. Shibuya, T. Akiba, and K. Kawase, “Cherenkov phase matched THz-wave generation with surfing configuration for bulk lithium nobate crystal,” Opt. Express 17(9), 7102–7109 (2009).
    [CrossRef] [PubMed]
  16. K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
    [CrossRef]
  17. H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
    [CrossRef]
  18. F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
    [CrossRef]
  19. H. Ito, K. Miyamoto, and H. Minamide, “Ultra-broadband, frequency-agile THz-wave generator and its applications,” in Advanced Solid-State Photonics, (Optical Society of America, 2008), WD1.
  20. K. Suizu, K. Miyamoto, T. Yamashita, and H. Ito, “High-power terahertz-wave generation using DAST crystal and detection using mid-infrared powermeter,” Opt. Lett. 32(19), 2885–2887 (2007).
    [CrossRef] [PubMed]
  21. T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, “Tunable Sub-Terahertz Wave Generation from an Organic DAST Crystal,” Jpn. J. Appl. Phys. 44(21), L652–L654 (2005).
    [CrossRef]
  22. J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
    [CrossRef]

2009 (4)

2008 (1)

2007 (3)

K. Suizu, K. Miyamoto, T. Yamashita, and H. Ito, “High-power terahertz-wave generation using DAST crystal and detection using mid-infrared powermeter,” Opt. Lett. 32(19), 2885–2887 (2007).
[CrossRef] [PubMed]

K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
[CrossRef]

H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
[CrossRef]

2005 (1)

T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, “Tunable Sub-Terahertz Wave Generation from an Organic DAST Crystal,” Jpn. J. Appl. Phys. 44(21), L652–L654 (2005).
[CrossRef]

2004 (1)

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

2003 (2)

J. K. Wahlstrand and R. Merlin, “Cherenkov radiation emitted by ultrafast laser pulses and the generation of coherent polaritons,” Phys. Rev. B 68(5), 054301 (2003).
[CrossRef]

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
[CrossRef]

2002 (3)

2001 (1)

Y. Avetisyan, Y. Sasaki, and H. Ito, “Analysis of THz-wave surface-emitted difference-frequency generation in periodically poled lithium niobate waveguide,” Appl. Phys. B 73, 511–514 (2001).

1997 (1)

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

1996 (1)

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

1984 (2)

D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
[CrossRef]

D. A. Kleinman and D. H. Auston, “Theory of electro-optic shock radiation in nonlinear optical media,” IEEE J. Quantum Electron. 20(8), 964–970 (1984).
[CrossRef]

1972 (1)

G. D. Boyd, T. J. Bridges, C. K. N. Patel, and E. Buehler, “Phase-matched submillimeter wave generation by difference-frequency mixing in ZnGeP2,” Appl. Phys. Lett. 21(11), 553–555 (1972).
[CrossRef]

Akhmedzhanov, R. A.

Akiba, T.

Almasi, G.

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

J. Hebling, G. Almasi, I. Kozma, and J. Kuhl, “Velocity matching by pulse front tilting for large area THz-pulse generation,” Opt. Express 10(21), 1161–1166 (2002).
[PubMed]

Auston, D. H.

D. A. Kleinman and D. H. Auston, “Theory of electro-optic shock radiation in nonlinear optical media,” IEEE J. Quantum Electron. 20(8), 964–970 (1984).
[CrossRef]

D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
[CrossRef]

Avetisyan, Y.

Y. Avetisyan, Y. Sasaki, and H. Ito, “Analysis of THz-wave surface-emitted difference-frequency generation in periodically poled lithium niobate waveguide,” Appl. Phys. B 73, 511–514 (2001).

Bakunov, M. I.

Bartal, B.

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

Bodrov, S. B.

Bosshard, Ch.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Boyd, G. D.

G. D. Boyd, T. J. Bridges, C. K. N. Patel, and E. Buehler, “Phase-matched submillimeter wave generation by difference-frequency mixing in ZnGeP2,” Appl. Phys. Lett. 21(11), 553–555 (1972).
[CrossRef]

Bridges, T. J.

G. D. Boyd, T. J. Bridges, C. K. N. Patel, and E. Buehler, “Phase-matched submillimeter wave generation by difference-frequency mixing in ZnGeP2,” Appl. Phys. Lett. 21(11), 553–555 (1972).
[CrossRef]

Buehler, E.

G. D. Boyd, T. J. Bridges, C. K. N. Patel, and E. Buehler, “Phase-matched submillimeter wave generation by difference-frequency mixing in ZnGeP2,” Appl. Phys. Lett. 21(11), 553–555 (1972).
[CrossRef]

Cheung, K. P.

D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
[CrossRef]

Ding, Y. J.

Fernelius, N.

Follonier, S.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Gunter, P.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Hebling, J.

K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
[CrossRef]

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

J. Hebling, G. Almasi, I. Kozma, and J. Kuhl, “Velocity matching by pulse front tilting for large area THz-pulse generation,” Opt. Express 10(21), 1161–1166 (2002).
[PubMed]

Hoffmann, M. C.

K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
[CrossRef]

Ikeda, S.

T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, “Tunable Sub-Terahertz Wave Generation from an Organic DAST Crystal,” Jpn. J. Appl. Phys. 44(21), L652–L654 (2005).
[CrossRef]

Ilyakov, I. E.

Imai, K.

K. Kawase, H. Minamide, K. Imai, J. Shikata, and H. Ito, “Injection-seeded terahertz-wave parametric generator with wide tenability,” Appl. Phys. Lett. 80(2), 195–197 (2002).
[CrossRef]

Ito, H.

K. Suizu, K. Miyamoto, T. Yamashita, and H. Ito, “High-power terahertz-wave generation using DAST crystal and detection using mid-infrared powermeter,” Opt. Lett. 32(19), 2885–2887 (2007).
[CrossRef] [PubMed]

H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
[CrossRef]

K. Kawase, H. Minamide, K. Imai, J. Shikata, and H. Ito, “Injection-seeded terahertz-wave parametric generator with wide tenability,” Appl. Phys. Lett. 80(2), 195–197 (2002).
[CrossRef]

Y. Avetisyan, Y. Sasaki, and H. Ito, “Analysis of THz-wave surface-emitted difference-frequency generation in periodically poled lithium niobate waveguide,” Appl. Phys. B 73, 511–514 (2001).

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

Kawase, K.

K. Suizu, K. Koketsu, T. Shibuya, T. Tsutsui, T. Akiba, and K. Kawase, “Extremely frequency-widened terahertz wave generation using Cherenkov-type radiation,” Opt. Express 17(8), 6676–6681 (2009).
[CrossRef] [PubMed]

K. Suizu, T. Tsutsui, T. Shibuya, T. Akiba, and K. Kawase, “Cherenkov phase matched THz-wave generation with surfing configuration for bulk lithium nobate crystal,” Opt. Express 17(9), 7102–7109 (2009).
[CrossRef] [PubMed]

T. Shibuya, T. Tsutsui, K. Suizu, T. Akiba, and K. Kawase, “Efficient Cherenkov-Type Phase-Matched Widely Tunable Terahertz-Wave Generation via an Optimized Pump Beam Shape,” Appl. Phys. Express 2, 032302 (2009).
[CrossRef]

K. Suizu, T. Shibuya, T. Akiba, T. Tutui, C. Otani, and K. Kawase, “Cherenkov phase-matched monochromatic THzwave generation using difference frequency generation with a lithium niobate crystal,” Opt. Express 16(10), 7493–7498 (2008).
[CrossRef] [PubMed]

K. Kawase, H. Minamide, K. Imai, J. Shikata, and H. Ito, “Injection-seeded terahertz-wave parametric generator with wide tenability,” Appl. Phys. Lett. 80(2), 195–197 (2002).
[CrossRef]

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

Kimura, T.

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
[CrossRef]

Kleinman, D. A.

D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
[CrossRef]

D. A. Kleinman and D. H. Auston, “Theory of electro-optic shock radiation in nonlinear optical media,” IEEE J. Quantum Electron. 20(8), 964–970 (1984).
[CrossRef]

Knopfle, G.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Koketsu, K.

Kozma, I.

Kuhl, J.

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

J. Hebling, G. Almasi, I. Kozma, and J. Kuhl, “Velocity matching by pulse front tilting for large area THz-pulse generation,” Opt. Express 10(21), 1161–1166 (2002).
[PubMed]

Merlin, R.

J. K. Wahlstrand and R. Merlin, “Cherenkov radiation emitted by ultrafast laser pulses and the generation of coherent polaritons,” Phys. Rev. B 68(5), 054301 (2003).
[CrossRef]

Minamide, H.

K. Kawase, H. Minamide, K. Imai, J. Shikata, and H. Ito, “Injection-seeded terahertz-wave parametric generator with wide tenability,” Appl. Phys. Lett. 80(2), 195–197 (2002).
[CrossRef]

Miyamoto, K.

Nakamura, K.

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

Nakanishi, H.

T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, “Tunable Sub-Terahertz Wave Generation from an Organic DAST Crystal,” Jpn. J. Appl. Phys. 44(21), L652–L654 (2005).
[CrossRef]

Nawahara, A.

H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
[CrossRef]

Nelson, K. A.

K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
[CrossRef]

Nishizawa, J.

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
[CrossRef]

Okada, S.

T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, “Tunable Sub-Terahertz Wave Generation from an Organic DAST Crystal,” Jpn. J. Appl. Phys. 44(21), L652–L654 (2005).
[CrossRef]

Otani, C.

Pan, F.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Patel, C. K. N.

G. D. Boyd, T. J. Bridges, C. K. N. Patel, and E. Buehler, “Phase-matched submillimeter wave generation by difference-frequency mixing in ZnGeP2,” Appl. Phys. Lett. 21(11), 553–555 (1972).
[CrossRef]

Saito, K.

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
[CrossRef]

Sasaki, Y.

Y. Avetisyan, Y. Sasaki, and H. Ito, “Analysis of THz-wave surface-emitted difference-frequency generation in periodically poled lithium niobate waveguide,” Appl. Phys. B 73, 511–514 (2001).

Sato, M.

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

Sato, T.

H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
[CrossRef]

Shi, W.

Shibuya, T.

Shikata, J.

K. Kawase, H. Minamide, K. Imai, J. Shikata, and H. Ito, “Injection-seeded terahertz-wave parametric generator with wide tenability,” Appl. Phys. Lett. 80(2), 195–197 (2002).
[CrossRef]

Shishkin, B. V.

Spreiter, R.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Stepanov, A. G.

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

Stepanov, A. N.

Suizu, K.

Suto, K.

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
[CrossRef]

Tanabe, T.

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Tunable terahertz wave generation in the 3- to 7-THz region from GaP,” Appl. Phys. Lett. 83(2), 237–239 (2003).
[CrossRef]

Taniuchi, T.

T. Taniuchi, S. Ikeda, S. Okada, and H. Nakanishi, “Tunable Sub-Terahertz Wave Generation from an Organic DAST Crystal,” Jpn. J. Appl. Phys. 44(21), L652–L654 (2005).
[CrossRef]

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

Tsutsui, T.

Tutui, T.

Valdmanis, J. A.

D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
[CrossRef]

Vodopyanov, K.

Wahlstrand, J. K.

J. K. Wahlstrand and R. Merlin, “Cherenkov radiation emitted by ultrafast laser pulses and the generation of coherent polaritons,” Phys. Rev. B 68(5), 054301 (2003).
[CrossRef]

Wong, M. S.

F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

Yamashita, T.

K. Suizu, K. Miyamoto, T. Yamashita, and H. Ito, “High-power terahertz-wave generation using DAST crystal and detection using mid-infrared powermeter,” Opt. Lett. 32(19), 2885–2887 (2007).
[CrossRef] [PubMed]

H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
[CrossRef]

Yeh, K.-L.

K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
[CrossRef]

Appl. Phys. B (2)

Y. Avetisyan, Y. Sasaki, and H. Ito, “Analysis of THz-wave surface-emitted difference-frequency generation in periodically poled lithium niobate waveguide,” Appl. Phys. B 73, 511–514 (2001).

J. Hebling, A. G. Stepanov, G. Almasi, B. Bartal, and J. Kuhl, “Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts,” Appl. Phys. B 78(5), 593–599 (2004).
[CrossRef]

Appl. Phys. Express (1)

T. Shibuya, T. Tsutsui, K. Suizu, T. Akiba, and K. Kawase, “Efficient Cherenkov-Type Phase-Matched Widely Tunable Terahertz-Wave Generation via an Optimized Pump Beam Shape,” Appl. Phys. Express 2, 032302 (2009).
[CrossRef]

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F. Pan, G. Knopfle, Ch. Bosshard, S. Follonier, R. Spreiter, M. S. Wong, and P. Gunter, “Electro-optic properties of the organic salt 4-N,N-dimethylamino-4’-N’-methyl-stilbazolium tosylate,” Appl. Phys. Lett. 69(1), 13–15 (1996).
[CrossRef]

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[CrossRef]

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[CrossRef]

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[CrossRef]

K.-L. Yeh, M. C. Hoffmann, J. Hebling, and K. A. Nelson, “Generation of 10 μJ ultrashort terahertz pulses by optical rectification,” Appl. Phys. Lett. 90(17), 171121 (2007).
[CrossRef]

K. Kawase, M. Sato, K. Nakamura, T. Taniuchi, and H. Ito, “Uni-directional radiation of widely tunable THz-wave using a prism coupler under non-collinear phase matching condition,” Appl. Phys. Lett. 71(6), 753–755 (1997).
[CrossRef]

IEEE J. Quantum Electron. (1)

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[CrossRef]

Jpn. J. Appl. Phys. (2)

H. Ito, K. Suizu, T. Yamashita, A. Nawahara, and T. Sato, “Random frequency accessible broad tunable terahertz-wave source using phase-matched 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal,” Jpn. J. Appl. Phys. 46(11), 7321–7324 (2007).
[CrossRef]

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[CrossRef]

Opt. Express (5)

Opt. Lett. (2)

Phys. Rev. B (1)

J. K. Wahlstrand and R. Merlin, “Cherenkov radiation emitted by ultrafast laser pulses and the generation of coherent polaritons,” Phys. Rev. B 68(5), 054301 (2003).
[CrossRef]

Phys. Rev. Lett. (1)

D. H. Auston, K. P. Cheung, J. A. Valdmanis, and D. A. Kleinman, “Cherenkov radiation from femtosecond optical pulses in electro-optic media,” Phys. Rev. Lett. 53(16), 1555–1558 (1984).
[CrossRef]

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H. Ito, K. Miyamoto, and H. Minamide, “Ultra-broadband, frequency-agile THz-wave generator and its applications,” in Advanced Solid-State Photonics, (Optical Society of America, 2008), WD1.

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Figures (5)

Fig. 1
Fig. 1

Phase matching vectors of the DFG process for three different relative wave vectors of the THz and optical radiation. The blue, green, and red arrows denote the pump, signal, and THz radiation, respectively. Cherenkov phase matching is achieved when kTHz > k1 - k2, collinear phase matching is achieved when kTHz = k1 - k2, and phase matching cannot be achieved when kTHz < k1 - k2.

Fig. 2
Fig. 2

Calculated phase matching factor for DFG in a DAST crystal. The black, blue, and red curves correspond to 1300, 1400, and 1500-nm pump wavelengths, respectively. The Cherenkov phase-matching condition is satisfied in the blue region, but not in the pink region. The collinear phase matching condition is satisfied at the intersection points with the horizontal axis in which dk = 0.

Fig. 3
Fig. 3

Calculated Cherenkov angles between the DAST crystal and Si cladding layer. The solid curves correspond to the angles inside the crystal (from Eq. (1), and the dashed curves to the angles in the cladding layer (from Eq. (2). The black, blue, and red curves correspond to 1300, 1400, and 1500-nm pump wavelengths, respectively.

Fig. 4
Fig. 4

Schematic diagram of the experimental configuration. The DAST single crystal is shown in red, and the Si prism coupler in blue.

Fig. 5
Fig. 5

THz output spectra under pump wavelengths ranging from 1300 nm to 1450 nm.

Equations (2)

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cos θ c r y s t a l = λ T H z n T H z 2 L c = λ T H z n T H z λ 1 λ 2 ( n 1 λ 2 n 2 λ 1 ) n o p t n T H z
θ c l a d = π 2 β = π 2 arcsin ( n T H z n c l a d sin ( α ) ) = π 2 arcsin ( n T H z n c l a d sin ( π 2 θ c r y s t a l ) ) = π 2 arcsin ( n T H z n c l a d sin ( π 2 arccos ( n 1 λ 2 n 2 λ 1 n T H z ( λ 2 λ 1 ) ) ) ) = arccos ( n 1 λ 2 n 2 λ 1 n c l a d ( λ 2 λ 1 ) )

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