H. Schneider, T. Maier, M. Walther, and H. C. Liu, “Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells,” Appl. Phys. Lett. 91, 191116 (2007).

[CrossRef]

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

H. Schneider, T. Maier, H. C. Liu, M. Walther, and P. Koidl, “Ultra-sensitive femtosecond two-photon detector with resonantly enhanced nonlinear absorption,” Opt. Lett. 30, 287–289 (2005).

[CrossRef]
[PubMed]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

C. Schönbein, H. Schneider, and M. Walther, “Coherent carrier propagation in the continuum of asymmetric quantum well structures,” Phys. Rev. B 60, R13993–R13996 (1999).

[CrossRef]

H. Schneider, C. Schnbein, P. Koidl, and G. Weimann, “Influence of optical interference in quantum well infrared photodetectors with 45° facet geometry,” Appl. Phys. Lett. 74, 16 (1999).

[CrossRef]

S. Ehret and H. Schneider, “Generation of subpicosecond infrared pulses tunable between 5.2 µm and 18 µm at a repetition rate of 76 MHz,” Appl. Phys. B 66, 27–30 (1998).

[CrossRef]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

C. Gmachl, O. Malis, and A. Belyanin, “Optical Nonlinearities in Intersubband transitions and Quantum Cascade Lasers,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 181–235.

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, and A. Y. Cho, “Quantum Interference in Intersubband Transitions,” in Intersubband Transitions in Quantum Wells: Physics and Device Applications II, Semicond. Semimet.62, H. C. Liu and F. Capasso, eds. (Academic Press, 2000), pp. 101–128.

[CrossRef]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, and A. Y. Cho, “Quantum Interference in Intersubband Transitions,” in Intersubband Transitions in Quantum Wells: Physics and Device Applications II, Semicond. Semimet.62, H. C. Liu and F. Capasso, eds. (Academic Press, 2000), pp. 101–128.

[CrossRef]

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

S. Ehret and H. Schneider, “Generation of subpicosecond infrared pulses tunable between 5.2 µm and 18 µm at a repetition rate of 76 MHz,” Appl. Phys. B 66, 27–30 (1998).

[CrossRef]

T. Elsaesser, “Ultrafast Dynamics of Intersubband Excitations in Quantum Wells and Quantum Cascade Structures,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 181–235.

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, and A. Y. Cho, “Quantum Interference in Intersubband Transitions,” in Intersubband Transitions in Quantum Wells: Physics and Device Applications II, Semicond. Semimet.62, H. C. Liu and F. Capasso, eds. (Academic Press, 2000), pp. 101–128.

[CrossRef]

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

C. Gmachl, O. Malis, and A. Belyanin, “Optical Nonlinearities in Intersubband transitions and Quantum Cascade Lasers,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 181–235.

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

H. Schneider, T. Maier, H. C. Liu, M. Walther, and P. Koidl, “Ultra-sensitive femtosecond two-photon detector with resonantly enhanced nonlinear absorption,” Opt. Lett. 30, 287–289 (2005).

[CrossRef]
[PubMed]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

H. Schneider, C. Schnbein, P. Koidl, and G. Weimann, “Influence of optical interference in quantum well infrared photodetectors with 45° facet geometry,” Appl. Phys. Lett. 74, 16 (1999).

[CrossRef]

H. Schneider, T. Maier, M. Walther, and H. C. Liu, “Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells,” Appl. Phys. Lett. 91, 191116 (2007).

[CrossRef]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

H. Schneider, T. Maier, H. C. Liu, M. Walther, and P. Koidl, “Ultra-sensitive femtosecond two-photon detector with resonantly enhanced nonlinear absorption,” Opt. Lett. 30, 287–289 (2005).

[CrossRef]
[PubMed]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

H. Schneider and H. C. Liu, Quantum Well Infrared Photodetectors: Physics and Applications (Springer, 2006).

H. Schneider, T. Maier, M. Walther, and H. C. Liu, “Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells,” Appl. Phys. Lett. 91, 191116 (2007).

[CrossRef]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

H. Schneider, T. Maier, H. C. Liu, M. Walther, and P. Koidl, “Ultra-sensitive femtosecond two-photon detector with resonantly enhanced nonlinear absorption,” Opt. Lett. 30, 287–289 (2005).

[CrossRef]
[PubMed]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

C. Gmachl, O. Malis, and A. Belyanin, “Optical Nonlinearities in Intersubband transitions and Quantum Cascade Lasers,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 181–235.

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

H. Schneider, C. Schnbein, P. Koidl, and G. Weimann, “Influence of optical interference in quantum well infrared photodetectors with 45° facet geometry,” Appl. Phys. Lett. 74, 16 (1999).

[CrossRef]

H. Schneider, T. Maier, M. Walther, and H. C. Liu, “Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells,” Appl. Phys. Lett. 91, 191116 (2007).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

H. Schneider, T. Maier, H. C. Liu, M. Walther, and P. Koidl, “Ultra-sensitive femtosecond two-photon detector with resonantly enhanced nonlinear absorption,” Opt. Lett. 30, 287–289 (2005).

[CrossRef]
[PubMed]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

H. Schneider, C. Schnbein, P. Koidl, and G. Weimann, “Influence of optical interference in quantum well infrared photodetectors with 45° facet geometry,” Appl. Phys. Lett. 74, 16 (1999).

[CrossRef]

C. Schönbein, H. Schneider, and M. Walther, “Coherent carrier propagation in the continuum of asymmetric quantum well structures,” Phys. Rev. B 60, R13993–R13996 (1999).

[CrossRef]

S. Ehret and H. Schneider, “Generation of subpicosecond infrared pulses tunable between 5.2 µm and 18 µm at a repetition rate of 76 MHz,” Appl. Phys. B 66, 27–30 (1998).

[CrossRef]

H. Schneider and H. C. Liu, Quantum Well Infrared Photodetectors: Physics and Applications (Springer, 2006).

C. Schönbein, H. Schneider, and M. Walther, “Coherent carrier propagation in the continuum of asymmetric quantum well structures,” Phys. Rev. B 60, R13993–R13996 (1999).

[CrossRef]

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, and A. Y. Cho, “Quantum Interference in Intersubband Transitions,” in Intersubband Transitions in Quantum Wells: Physics and Device Applications II, Semicond. Semimet.62, H. C. Liu and F. Capasso, eds. (Academic Press, 2000), pp. 101–128.

[CrossRef]

C. Sirtori and R. Teissier, “Quantum Cascade Lasers: Overview of Basic Principles and State of the Art,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 1–44.

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, and A. Y. Cho, “Quantum Interference in Intersubband Transitions,” in Intersubband Transitions in Quantum Wells: Physics and Device Applications II, Semicond. Semimet.62, H. C. Liu and F. Capasso, eds. (Academic Press, 2000), pp. 101–128.

[CrossRef]

C. Sirtori and R. Teissier, “Quantum Cascade Lasers: Overview of Basic Principles and State of the Art,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 1–44.

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

H. Schneider, T. Maier, M. Walther, and H. C. Liu, “Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells,” Appl. Phys. Lett. 91, 191116 (2007).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

H. Schneider, T. Maier, H. C. Liu, M. Walther, and P. Koidl, “Ultra-sensitive femtosecond two-photon detector with resonantly enhanced nonlinear absorption,” Opt. Lett. 30, 287–289 (2005).

[CrossRef]
[PubMed]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

C. Schönbein, H. Schneider, and M. Walther, “Coherent carrier propagation in the continuum of asymmetric quantum well structures,” Phys. Rev. B 60, R13993–R13996 (1999).

[CrossRef]

H. Schneider, C. Schnbein, P. Koidl, and G. Weimann, “Influence of optical interference in quantum well infrared photodetectors with 45° facet geometry,” Appl. Phys. Lett. 74, 16 (1999).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

S. Ehret and H. Schneider, “Generation of subpicosecond infrared pulses tunable between 5.2 µm and 18 µm at a repetition rate of 76 MHz,” Appl. Phys. B 66, 27–30 (1998).

[CrossRef]

T. Maier, H. Schneider, M. Walther, P. Koidl, and H. C. Liu, “Resonant two-photon photoemission in quantum well infrared photodetectors,” Appl. Phys. Lett 84, 5162–5164 (2004).

[CrossRef]

H. Schneider, C. Schnbein, P. Koidl, and G. Weimann, “Influence of optical interference in quantum well infrared photodetectors with 45° facet geometry,” Appl. Phys. Lett. 74, 16 (1999).

[CrossRef]

H. Schneider, T. Maier, M. Walther, and H. C. Liu, “Two-photon photocurrent spectroscopy of electron intersubband relaxation and dephasing in quantum wells,” Appl. Phys. Lett. 91, 191116 (2007).

[CrossRef]

H. Schneider, O. Drachenko, S. Winnerl, M. Helm, and M. Walther, “Quadratic autocorrelation of free-electron laser radiation and photocurrent saturation in two-photon quantum-well infrared photodetectors,” Appl. Phys. Lett. 89, 133508 (2006).

[CrossRef]

T. Maier, H. Schneider, H. C. Liu, M. Walther, and P. Koidl, “Two-photon QWIPs for quadratic detection of weak mid-infrared pulsed lasers,” Infrared Phys. Technol. 47, 182–187 (2005).

[CrossRef]

T. Hattori, Y. Kawashima, M. Daikoku, H. Inouye, and H. Nakatsuka, “Femtosecond Two-Photon Response Dynamics of Photomultiplier Tubes,” Jpn. J. Appl. Phys. 39, 4793–4798 (2000).

[CrossRef]

M. D. Frogley, J. F. Dynes, M. Beck, J. Faist, and C. C. Phillips, “Gain without inversion in semiconductor nanostructures,” Nature Mat. 5, 175–178 (2006).

[CrossRef]

C. Schönbein, H. Schneider, and M. Walther, “Coherent carrier propagation in the continuum of asymmetric quantum well structures,” Phys. Rev. B 60, R13993–R13996 (1999).

[CrossRef]

G. B. Serapiglia, E. Paspalakis, C. Sirtori, K. L. Vodopyanov, and C. C. Phillips, “Laser-Induced Quantum Coherence in a Semiconductor Quantum Well,” Phys. Rev. Lett. 84, 1019–1023 (2000).

[CrossRef]
[PubMed]

R. Paiella, F. Capasso, C. Gmachl, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, and H. C. Liu, “Self-Mode-Locking of Quantum Cascade Lasers with Ultrafast Optical Nonlinearities,” Science 290, 1739–1742 (2000).

[CrossRef]
[PubMed]

T. Elsaesser, “Ultrafast Dynamics of Intersubband Excitations in Quantum Wells and Quantum Cascade Structures,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 181–235.

H. Schneider and H. C. Liu, Quantum Well Infrared Photodetectors: Physics and Applications (Springer, 2006).

C. Sirtori and R. Teissier, “Quantum Cascade Lasers: Overview of Basic Principles and State of the Art,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 1–44.

J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, and A. Y. Cho, “Quantum Interference in Intersubband Transitions,” in Intersubband Transitions in Quantum Wells: Physics and Device Applications II, Semicond. Semimet.62, H. C. Liu and F. Capasso, eds. (Academic Press, 2000), pp. 101–128.

[CrossRef]

C. Gmachl, O. Malis, and A. Belyanin, “Optical Nonlinearities in Intersubband transitions and Quantum Cascade Lasers,” in Intersubband Transitions in Quantum Structures, R. Paiella, ed. (McGraw-Hill, 2006), pp. 181–235.