K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

G. Davies, A. D. Burnett, W. Fan, E. H. Linfield, and J. E. Cunningham, “Terahertz spectroscopy of explosives and drugs,” Mater. Today 11, 18–26 (2008).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

G. Davies, A. D. Burnett, W. Fan, E. H. Linfield, and J. E. Cunningham, “Terahertz spectroscopy of explosives and drugs,” Mater. Today 11, 18–26 (2008).

[Crossref]

G. Davies, A. D. Burnett, W. Fan, E. H. Linfield, and J. E. Cunningham, “Terahertz spectroscopy of explosives and drugs,” Mater. Today 11, 18–26 (2008).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Power scalability and frequency agility of compact terahertz source based on frequency mixing from solid-state lasers,” Appl. Phys. Lett. 98, 131106 (2011).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Compact and portable terahertz source by mixing two frequencies generated simultaneously by a single solid-state laser,” Opt. Lett. 35, 3979–3981 (2010).

[Crossref]

W. Shi, Y. J. Ding, N. Fernelius, and K. L. Vodopyanov, “An efficient, tunable, and coherent 0.18–5.27 THz source based on GaSe crystal,” Opt. Lett. 27, 1454–1456 (2002).

[Crossref]

G. Davies, A. D. Burnett, W. Fan, E. H. Linfield, and J. E. Cunningham, “Terahertz spectroscopy of explosives and drugs,” Mater. Today 11, 18–26 (2008).

[Crossref]

A. Lee, Y. He, and H. Pask, “Frequency-tunable THz source based on stimulated polariton scattering in Mg:LiNbO3,” IEEE J. Quantum Electron. 49, 357–364 (2013).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

T. Tanikuchi, J. I. Shikata, and H. Ito, “Continuously tunable THz-wave generation from GaP crystal by difference frequency mixing with a dual-wavelength KTP-OPO,” in 8th International Conference on Terahertz Electronics (2000), pp. 225–228.

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

K. Kato, “Parametric oscillation at 3.2 μm in KTP pumped at 1.064 μm,” IEEE J. Quantum Electron. 27, 1137–1140 (1991).

[Crossref]

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP,” J. Phys. D 37, 155–158 (2003).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

K. L. Vodopyanov and L. A. Kulevskii, “New dispersion relationships for GaSe in the 0.65–18 μm spectral region,” Opt. Commun. 118, 375–378 (1995).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

A. Lee, Y. He, and H. Pask, “Frequency-tunable THz source based on stimulated polariton scattering in Mg:LiNbO3,” IEEE J. Quantum Electron. 49, 357–364 (2013).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

G. Davies, A. D. Burnett, W. Fan, E. H. Linfield, and J. E. Cunningham, “Terahertz spectroscopy of explosives and drugs,” Mater. Today 11, 18–26 (2008).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP,” J. Phys. D 37, 155–158 (2003).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

A. Lee, Y. He, and H. Pask, “Frequency-tunable THz source based on stimulated polariton scattering in Mg:LiNbO3,” IEEE J. Quantum Electron. 49, 357–364 (2013).

[Crossref]

P. E. Powers, Fundamentals of Nonlinear Optics (CRC Press, 2011).

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Power scalability and frequency agility of compact terahertz source based on frequency mixing from solid-state lasers,” Appl. Phys. Lett. 98, 131106 (2011).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Compact and portable terahertz source by mixing two frequencies generated simultaneously by a single solid-state laser,” Opt. Lett. 35, 3979–3981 (2010).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP,” J. Phys. D 37, 155–158 (2003).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

W. Shi, Y. J. Ding, N. Fernelius, and K. L. Vodopyanov, “An efficient, tunable, and coherent 0.18–5.27 THz source based on GaSe crystal,” Opt. Lett. 27, 1454–1456 (2002).

[Crossref]

T. Tanikuchi, J. I. Shikata, and H. Ito, “Continuously tunable THz-wave generation from GaP crystal by difference frequency mixing with a dual-wavelength KTP-OPO,” in 8th International Conference on Terahertz Electronics (2000), pp. 225–228.

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP,” J. Phys. D 37, 155–158 (2003).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP,” J. Phys. D 37, 155–158 (2003).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

T. Tanikuchi, J. I. Shikata, and H. Ito, “Continuously tunable THz-wave generation from GaP crystal by difference frequency mixing with a dual-wavelength KTP-OPO,” in 8th International Conference on Terahertz Electronics (2000), pp. 225–228.

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1, 97–105 (2007).

[Crossref]

W. Shi, Y. J. Ding, N. Fernelius, and K. L. Vodopyanov, “An efficient, tunable, and coherent 0.18–5.27 THz source based on GaSe crystal,” Opt. Lett. 27, 1454–1456 (2002).

[Crossref]

K. L. Vodopyanov and L. A. Kulevskii, “New dispersion relationships for GaSe in the 0.65–18 μm spectral region,” Opt. Commun. 118, 375–378 (1995).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Power scalability and frequency agility of compact terahertz source based on frequency mixing from solid-state lasers,” Appl. Phys. Lett. 98, 131106 (2011).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Compact and portable terahertz source by mixing two frequencies generated simultaneously by a single solid-state laser,” Opt. Lett. 35, 3979–3981 (2010).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Power scalability and frequency agility of compact terahertz source based on frequency mixing from solid-state lasers,” Appl. Phys. Lett. 98, 131106 (2011).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Compact and portable terahertz source by mixing two frequencies generated simultaneously by a single solid-state laser,” Opt. Lett. 35, 3979–3981 (2010).

[Crossref]

K. Nawata, T. Abe, Y. Miyake, A. Sato, K. Asai, H. Ito, and H. Minamide, “Efficient terahertz-wave generation using a 4-dimethylamino-N-methyl-4-stilbazolium tosylate pumped by a dual-wavelength neodymium-doped yttrium aluminum garnet laser,” Appl. Phys. Express 5, 112401 (2012).

[Crossref]

P. X. Liu, X. Y. Zhang, C. Yan, D. G. Xu, Y. Li, W. Shi, G. C. Zhang, X. Z. Zhang, J. Q. Yao, and Y. C. Wu, “Widely tunable and monochromatic terahertz difference frequency generation with organic crystal 2-(3-(4-hydroxystyryl)-5, 5-dime-thylcyclohex-2-enylidene) malononitrile,” Appl. Phys. Lett. 380, 621–627 (2016).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Power scalability and frequency agility of compact terahertz source based on frequency mixing from solid-state lasers,” Appl. Phys. Lett. 98, 131106 (2011).

[Crossref]

A. Lee, Y. He, and H. Pask, “Frequency-tunable THz source based on stimulated polariton scattering in Mg:LiNbO3,” IEEE J. Quantum Electron. 49, 357–364 (2013).

[Crossref]

K. Kato, “Parametric oscillation at 3.2 μm in KTP pumped at 1.064 μm,” IEEE J. Quantum Electron. 27, 1137–1140 (1991).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, P. X. Liu, D. G. Xu, Y. Y. Wang, W. Shi, J. Q. Yao, A. N. Robert, and P. Nasser, “High-repetition-rate terahertz generation in QPM GaAs with a compact efficient 2-μm KTP OPO,” IEEE Photon. Technol. Lett. 28, 1501–1504 (2016).

[Crossref]

T. Tanabe, K. Suto, J. Nishizawa, K. Saito, and T. Kimura, “Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP,” J. Phys. D 37, 155–158 (2003).

[Crossref]

G. Davies, A. D. Burnett, W. Fan, E. H. Linfield, and J. E. Cunningham, “Terahertz spectroscopy of explosives and drugs,” Mater. Today 11, 18–26 (2008).

[Crossref]

M. Tonouchi, “Cutting-edge terahertz technology,” Nat. Photonics 1, 97–105 (2007).

[Crossref]

K. Zhong, J. Q. Yao, D. G. Xu, Z. Wang, Z. Y. Li, H. Y. Zhang, and P. Wang, “Enhancement of terahertz wave difference frequency generation based on a compact walk-off compensated KTP OPO,” Opt. Commun. 283, 3520–3524 (2010).

[Crossref]

K. L. Vodopyanov and L. A. Kulevskii, “New dispersion relationships for GaSe in the 0.65–18 μm spectral region,” Opt. Commun. 118, 375–378 (1995).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Tunable terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser,” Opt. Express 19, 779–786 (2011).

[Crossref]

S. A. Ku, W. C. Chu, C. W. Luo, Y. M. Andreev, G. Lanskii, A. Shaidukoi, T. Izaak, V. Svetlichnyi, K. H. Wu, and T. Kobayashi, “Optimal Te-doping in GaSe for non-linear applications,” Opt. Express 20, 5029–5037 (2012).

[Crossref]

J. L. Mei, K. Zhong, M. R. Wang, Y. Liu, D. G. Xu, W. Shi, Y. Y. Wang, J. Q. Yao, A. N. Robert, and P. Nasser, “Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm,” Opt. Express 24, 23368–23375 (2016).

[Crossref]

W. C. Chu, S. A. Ku, H. J. Wang, C. W. Luo, Y. M. Andreev, G. Lanskii, and T. Kobayashi, “Widely linear and non-phase-matched optical-to-terahertz conversion on GaSe:Te crystals,” Opt. Lett. 37, 945–947 (2012).

[Crossref]

W. Shi, Y. J. Ding, N. Fernelius, and K. L. Vodopyanov, “An efficient, tunable, and coherent 0.18–5.27 THz source based on GaSe crystal,” Opt. Lett. 27, 1454–1456 (2002).

[Crossref]

M. Tang, H. Minamide, Y. Y. Wang, T. Notake, S. Ohno, and H. Ito, “Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation,” Opt. Lett. 35, 1698–1700 (2010).

[Crossref]

P. Zhao, S. Ragam, Y. J. Ding, and I. B. Zotova, “Compact and portable terahertz source by mixing two frequencies generated simultaneously by a single solid-state laser,” Opt. Lett. 35, 3979–3981 (2010).

[Crossref]

D. G. Xu, W. Shi, K. Zhong, Y. Y. Wang, P. X. Liu, and J. Q. Yao, “The widely tunable THz generation in QPM-GaAs crystal pumped by a near-degenerate dual-wavelength KTP OPO at around 2.127 μm,” Proc. SPIE 8604, 86040 (2013).

[Crossref]

T. Tanikuchi, J. I. Shikata, and H. Ito, “Continuously tunable THz-wave generation from GaP crystal by difference frequency mixing with a dual-wavelength KTP-OPO,” in 8th International Conference on Terahertz Electronics (2000), pp. 225–228.

P. E. Powers, Fundamentals of Nonlinear Optics (CRC Press, 2011).