4Xu J Z., Zhang X C. Technolagy and Application of Terahertz Wave[M].(许景周,张希成.太赫兹波科学技术与应用.北京:北京大学出版社),PekingUniversityPress:Beijing.2007:1-5.
5Strachan C J, Rades T, Newnham D A, et al. Us- ing terahertz pulsed spectroscopy to study crystallinity of pharmaceutical materials[J]. Chem. Phys. Lett.2004, 390: 20-24.
6Takhashi M, Ishikawa Y, Nishizawa J, et al. Low- frequency vibrational modes of riboflavin and related compounds[J]. Chem. Phys. Lett. 2005, 401:475-482.
7Li X J, Hong Z, He J L, et al. Precisely optical mate- rial parameter determination by time domain waveform rebuilding with THz time-domain spectroscopy[J]. Opt. Commun. 2010, 283:4701-4706.
8Duvillaret L, Greeat F, Coutaz J L. A reliable method for extraction of material parameters in terahertz time- domain spectroscopy[J]. IEEE J. Sel. Top. Quantum. Electron. 1996, 2:739-746.
9Duvillaret L, Greeat F, Coutaz J L. Highly precise de- termination of optical constants and sample thickness in terahertz time-domain spectroscopy[J]. Appl. Opt. 1999, 38: 409-415.
