Instrumentation, Techniques, and Measurement

Optical coefficients extraction from terahertz time-domain transmission spectra based on multibeam interference principle

[+] Author Affiliations
Maorong Wang, Kai Zhong, Chu Liu, Degang Xu, Wei Shi, Jianquan Yao

Tianjin University, Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-electronics Engineering, Tianjin, China

Tianjin University, Key Laboratory of Opto-electronics Information Technology (Ministry of Education), Tianjin, China

Opt. Eng. 56(4), 044101 (Apr 06, 2017). doi:10.1117/1.OE.56.4.044101
History: Received January 5, 2017; Accepted March 15, 2017
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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.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Maorong Wang ; Kai Zhong ; Chu Liu ; Degang Xu ; Wei Shi, et al.
"Optical coefficients extraction from terahertz time-domain transmission spectra based on multibeam interference principle", Opt. Eng. 56(4), 044101 (Apr 06, 2017). ; http://dx.doi.org/10.1117/1.OE.56.4.044101


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