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Optical Engineering

Optical coefficients extraction from terahertz time-domain transmission spectra based on multibeam interference principle
Author(s): Maorong Wang; Kai Zhong; Chu Liu; Degang Xu; Wei Shi; Jian-Quan Yao
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Paper Abstract

We demonstrated a data-processing method based on multiple beam interference and Fresnel equations that simultaneously gave the refraction index and absorption coefficient from the raw data of terahertz (THz) time-domain spectroscopy (TDS), which laid the foundation for obtaining the dielectric parameters. This method was independent of phase processing, and complete material information was reserved without having to cut the time-domain signal. The optical coefficients including refractive indices and absorption coefficients of white polyethylene and quartz samples at different thicknesses were obtained. The applicability and accuracy of this method were discussed and verified by comparison with the traditional data-processing method of THz TDS.

Paper Details

Date Published: 6 April 2017
PDF: 6 pages
Opt. Eng. 56(4) 044101 doi: 10.1117/1.OE.56.4.044101
Published in: Optical Engineering Volume 56, Issue 4
Show Author Affiliations
Maorong Wang, Tianjin Univ. (China)
Kai Zhong, Tianjin Univ. (China)
Chu Liu, Tianjin Univ. (China)
Degang Xu, Tianjin Univ. (China)
Wei Shi, Tianjin Univ. (China)
Jian-Quan Yao, Tianjin Univ. (China)

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