[1] Peiponen K E, Zeitler A, Kuwata-Gonokami M. Terahertz spectroscopy and imaging[M]. Berlin, Heidelberg: Springer, 29-40(2013).

[2] Lu T L, Yuan H, Wu T et al. Continuous terahertz spectrum measurement based on interferometry[J]. Laser & Optoelectronics Progress, 53, 041202(2016).

[3] Yang Y P, Zhang Z W[M]. Terahertz imaging technology, 2-4(2008).

[4] Fattinger C, Grischkowsky D. Terahertz beams[J]. Applied Physics Letters, 54, 490-492(1989).

[5] Capasso F, Paiella R, Martini R et al. Quantum cascade lasers: ultrahigh-speed operation, optical wireless communication, narrow linewidth, and far-infrared emission[J]. IEEE Journal of Quantum Electronics, 38, 511-532(2002). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1005403

[6] Yokoyama S, Nakamura R, Nose M et al. Terahertz spectrum analyzer based on a terahertz frequency comb[J]. Optics Express, 16, 13052-13061(2008). http://www.opticsinfobase.org/abstract.cfm?uri=oe-16-17-13052

[7] Yasui T, Hayashi K, Ichikawa R et al. Real-time absolute frequency measurement of continuous-wave terahertz radiation based on dual terahertz combs of photocarriers with different frequency spacings[J]. Optics Express, 23, 11367-11377(2015). http://www.opticsinfobase.org/abstract.cfm?uri=oe-23-9-11367

[8] Lin Q G, Pan X J, Zheng S Q et al. Crossed and balanced single-shot electro-optic measurement for terahertz pulses[J]. Chinese Journal of Lasers, 44, 0114001(2017).

[9] Gaal P, Raschke M B, Reimann K et al. Measuring optical frequencies in the 0-40 THz range with non-synchronized electro-optic sampling[J]. Nature Photonics, 1, 577-580(2007). http://www.nature.com/articles/nphoton.2007.170

[10] Yasui T, Kabetani Y, Saneyoshi E et al. Terahertz frequency comb by multifrequency-heterodyning photoconductive detection for high-accuracy, high-resolution terahertz spectroscopy[J]. Applied Physics Letters, 88, 241104(2006). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4820542

[11] Cao J C. Terahertz semiconductor detectors[J]. Physics, 35, 953-956(2006).

[12] Guo X G, Gu L L, Fu Z L et al. Research on terahertz quantum-well photodetectors[J]. Laser & Optoelectronics Progress, 52, 092302(2015).

[13] Kokkonen K, Kaivola M. Scanning heterodyne laser interferometer for phase-sensitive absolute-amplitude measurements of surface vibrations[J]. Applied Physics Letters, 92, 063502(2008). http://scitation.aip.org/content/aip/journal/apl/92/6/10.1063/1.2840183

[14] Deninger A J, Göbel T, Schönherr D et al. Precisely tunable continuous-wave terahertz source with interferometric frequency control[J]. Review of Scientific Instruments, 79, 044702(2008). http://scitation.aip.org/content/aip/journal/rsi/79/4/10.1063/1.2905033

[15] Johnson J L, Dorney T D, Mittleman D M. Enhanced depth resolution in terahertz imaging using phase-shift interferometry[J]. Applied Physics Letters, 78, 835-837(2001). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4906040

[16] Naftaly M, Dean P, Miles R E et al. A simple interferometer for the analysis of terahertz sources and detectors[J]. IEEE Journal of Selected Topics in Quantum Electronics, 14, 443-448(2008). http://ieeexplore.ieee.org/document/4481125/

[17] Zhang L L, Mu K J, Zhou Y S et al. High-power THz to IR emission by femtosecond laser irradiation of random 2D metallic nanostructures[J]. Scientific Reports, 5, 12536(2015). http://pubmedcentralcanada.ca/pmcc/articles/PMC4513341/

[18] Zhao J, Zhang L L, Luo Y M et al. Power dependence of terahertz carrier frequency in a plasma-based two-color generation process[J]. Chinese Physics B, 23, 127201(2014). http://www.cqvip.com/QK/85823X/201412/662974950.html

[19] Xie J H, Zhao D Z, Yan J X[M]. Physical optics course, 125-127(2005).

[20] Kujawinska M, Robinson D W. Multichannel phase-stepped holographic interferometry[J]. Applied Optics, 27, 312-320(1988). http://www.ncbi.nlm.nih.gov/pubmed/20523592