[1] P JEPSEN, D COOKE, M KOCH. Terahertz spectroscopy and imaging-Modern techniques and applications. Laser & Photonics Reviews, 5, 124-166(2011).

[2] K KAWASE, J SHIKATA, K IMAI et al. Transform-limited, narrow-linewidth, terahertz-wave parametric generator. Applied Physics Letters, 78, 2819-2821(2001).

[3] E LINFIELD. A source of fresh hope. Nature Photonics, 1, 257-258(2007).

[4] D MITTLEMAN. Perspective: terahertz science and technology. Journal of Applied Physics, 122, 230901(2017).

[5] Wenhui FAN, Hui YAN, Xiaoqiang JANG et al. Ultrafast terahertz characteristic spectroscopy based on femtosecond laser and its application (Invited). Acta Photonica Sinica, 51, 0751403(2022).

[6] H SAKAI, K KAWASE, K MURATE. Highly sensitive multi-stage terahertz parametric detector. Optics Letters, 45, 3905-3908(2020).

[7] K MURATE, K KAWASE. Perspective: terahertz wave parametric generator and its applications. Journal of Applied Physics, 124, 160901(2018).

[8] H MINAMIDE, Jun ZHANG, Ruixiang GUO et al. High-sensitivity detection of terahertz waves using nonlinear up-conversion in an organic 4-dimethylamino-N-methyl-4-stilbazolium tosylate crystal. Applied Physics Letters, 97, 121106(2010).

[9] Ruixiang GUO, S OHNO, H MINAMIDE et al. Highly sensitive coherent detection of terahertz waves at room temperature using a parametric process. Applied Physics Letters, 93, 021106(2008).

[10] Y TAKIDA, K NAWATA, S SUZUKI et al. Nonlinear optical detection of terahertz-wave radiation from resonant tunneling diodes. Optics Express, 25, 5389-5396(2017).

[11] Yuye WANG, Changhao HU, Chao YAN et al. Highly sensitive multi-stage terahertz parametric upconversion detection based on a KTiOPO4 crystal. Optics Letters, 47, 5853-5856(2022).

[12] Shuzhen FAN, Feng QI, T NOTAKE et al. Diffraction-limited real-time terahertz imaging by optical frequency up-conversion in a DAST crystal. Optics Express, 23, 7611-7618(2015).

[13] Feng QI, Shuzhen FAN, T NOTAKE et al. 10 aJ-level sensing of nanosecond pulse below 10 THz by frequency upconversion detection via DAST crystal: more than a 4 K bolometer. Optics Letters, 39, 1294-1297(2014).

[14] Quanxin GUO, Shuzhen FAN, Xiaoqin YIN et al. Highly sensitive frequency upconversion detection from 1 to 3 THz with OH1 crystal. Optics Express, 31, 38970-38976(2023).

[15] M BORN, K HUANG. Dynamical theory of crystal lattices(1954).

[16] K HUANG. On the interaction between the radiation field and ionic crystals. Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 208, 352-365(1951).

[17] S KURTZ, J GIORDMAINE. Stimulated Raman scattering by polaritons. Physical Review Letters, 22, 192-196(1969).

[18] J GELBWACH, R PANTELL, H PUTHOFF et al. A tunable stimulated Raman oscillator. Applied Physics Letters, 14, 258-262(1969).

[19] J YARBOROUGH, S SUSSMAN, H PURHOFF et al. Efficient, tunable optical emission from LiNbO3 without a resonator. Applied Physics Letters, 15, 102-105(1969).

[20] Weitao WANG, Zhenhua CONG, Xiaohan CHEN et al. Terahertz parametric oscillator based on KTiOPO4 crystal. Optics Letters, 39, 3706-3709(2014).

[21] H MINAMIDE, S HAYASHI, K NAWATA et al. Kilowatt-peak terahertz-wave generation and sub-femtojoule terahertz-wave pulse detection based on nonlinear optical wavelength-conversion at room temperature. Journal of Infrared, Millimeter, and Terahertz Waves, 35, 25-37(2014).

[22] Feilong GAO, Xingyu ZHANG, Zhenhua CONG et al. Enhancement of intracavity-pumped terahertz parametric oscillator power by adopting diode-side pumped configuration based on KTiOPO4 crystal. Crystals, 9, 666(2019).

[23] Weitao WANG, Zhenhua CONG, Zhaojun LIU et al. THz-wave generation via stimulated polariton scattering in KTiOAsO4 crystal. Optics Express, 22, 17092-17098(2014).

[24] Feilong GAO, Xingyu ZHANG, Zhenhua CONG et al. Terahertz parametric oscillator with the surface-emitted configuration in RbTiOPO4 crystal. Optics and Laser Technology, 104, 37-42(2018).

[25] Yuye WANG, Gang NIE, Changhao HU et al. High-sensitive terahertz detection by parametric up-conversion using nanosecond pulsed laser. Chinese Physics B, 31, 024204(2022).

[26] Peng WANG, Xingyu ZHANG, Zhenhua CONG et al. Modeling of intracavity-pumped Q-switched terahertz parametric oscillators based on stimulated polariton scattering. Optics Express, 28, 6966-6980(2020).

[27] Zecheng WANG, Shuzhen FAN, Xiaohan CHEN et al. Modeling for extracavity-pumped terahertz parametric oscillators. Optics Express, 30, 29518-29530(2022).

[29] T A ORTEGA. Frequency extension of solid-state terahertz lasers(2017).

[30] G H WATSON. Polarized Raman spectra of KTiOAsO4 and isomorphic nonlinear-optical crystals. Journal of Raman Spectroscopy, 22, 705-713(1991).

[31] Feilong GAO, Xingyu ZHANG, Zhenhua CONG et al. High average power diode-side-pumped intracavity terahertz parametric source based on stimulated polariton scattering in RbTiOPO4 crystal. IEEE Photonics Journal, 12, 2981527(2020).

[32] Jiyang WANG, Lixia LI, Suhui LIU et al. The inelastic light scattering of RbTiOPO4 single crystal. Ferroelectrics, 132, 197-202(1992).