Abstract

In our research, terahertz frequency-domain spectroscopy based on continuous-wave and coherent detection, which offers advantages of frequency selectivity and much higher frequency resolution, is used to acquire the optical parameter of nonpolar liquid samples in a polytetrafluoroethylene (PTFE) rectangle cell. The transfer matrix method is raised to remove the oscillation generated by the Fabry–Perot interferometer caused by the cell wall; thereby, dielectric constants of liquids can be extracted successfully. The refractive index of the nonpolar liquid samples cyclohexane (${{\rm C}_6}{{\rm H}_{12}})$ and ${\rm n}$-Hexane (${{\rm C}_6}{{\rm H}_{14}}$) are obtained within the frequency range of 400–1600 GHz. The processed results of cyclohexane and n-Hexane in our method are basically stable with a refractive index of about 1.42 and 1.37, respectively, which agrees well with the experimental results using other methods previously.

© 2020 Optical Society of America

Terahertz time-domain spectroscopy of sulfur-containing biomolecules

Kohji Yamamoto, Md. Humayun Kabir, and Keisuke Tominaga
J. Opt. Soc. Am. B 22(11) 2417-2426 (2005)

Molecular polarizability investigation of polar solvents: water, ethanol, and acetone at terahertz frequencies using terahertz time-domain spectroscopy

Tianyao Zhang, Zhaohui Zhang, Xiaoyan Zhao, Can Cao, Yang Yu, Xingyue Li, Ying Li, Yan Chen, and Qing Ren
Appl. Opt. 59(16) 4775-4779 (2020)

Terahertz reflection spectroscopy of Debye relaxation in polar liquids [Invited]

Uffe Møller, David G. Cooke, Koichiro Tanaka, and Peter Uhd Jepsen
J. Opt. Soc. Am. B 26(9) A113-A125 (2009)

Uncertainty in terahertz time-domain spectroscopy measurement

Withawat Withayachumnankul, Bernd M. Fischer, Hungyen Lin, and Derek Abbott
J. Opt. Soc. Am. B 25(6) 1059-1072 (2008)

Detection of aging in the common explosive RDX using terahertz time-domain spectroscopy

Zhijin Yan and Wei Shi
J. Opt. Soc. Am. B 39(3) A9-A12 (2022)