[1] HANGYO M, NAGASHIMA T, NASHIMA S. Spectroscopy by pulsed terahertz radiation[J]. Measurement Science and Technology, 13, 1727-1738(2002).

[2] [2] KEMP M C, TADAY P F, COLE B E, et al. Security applications of terahertz technology[C]Proceedings of terahertz f military security applications. lo, Flida, United States: SPIE, 2003.

[4] CHEN J, CHEN Y Q, ZHAO H W. Absorption coefficients of selected explosives and related compounds in the range of 0.1-2.8 THz[J]. Optics Express, 15, 12060-12067(2007).

[8] FEDERICI J F, SCHULKIN B, HUANG F. THz imaging and sensing for security applications-explosives, weapons and drugs[J]. Semiconductor Science and Technology, 20, S266-S280(2005).

[9] [9] SHAN J. Terahertz timedomain spectroscopy its applications[C]Proceedings of 2008 spring meeting of the Ohioregion section of APS. Youngstown, Ohio: American Physical Society, 2008.

[10] DIETZ R J B, VIEWEG N, PUPPE T. All fiber-coupled THz-TDS system with kHz measurement rate based on electronically controlled optical sampling[J]. Optics Letters, 39, 6482-6485(2014).

[11] WILK R, HOCHREIN T, KOCH M. Terahertz spectrometer operation by laser repetition frequency tuning[J]. Journal of the Optical Society of America B, 28, 592-595(2011).

[12] LIU C, YUE L Y, WANG X K. Measurement of optical parameters of organic solvents by THz time-domain reflection spectroscopy[J]. Spectroscopy and Spectral Analysis, 32, 1471-1475(2012).

[13] JANSEN C, PRIEBE S, MOLLER C. Diffuse scattering from rough surfaces in THz communication channels[J]. IEEE Transactions on Terahertz Science and Technology, 1, 462-472(2011).

[14] FITCH M J, LEAHY-HOPPA M R, OTT E W. Molecular absorption cross-section and absolute absorptivity in the THz frequency range for the explosives TNT, RDX, HMX, and PETN[J]. Chemical Physics Letters, 443, 284-288(2007).