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

Maorong Wang; Kai Zhong; Chu Liu; Degang Xu; Wei Shi; Jian-Quan Yao

doi:10.1117/1.OE.56.4.044101

6 April 2017 Optical coefficients extraction from terahertz time-domain transmission spectra based on multibeam interference principle

Maorong Wang, Kai Zhong, Chu Liu, Degang Xu, Wei Shi, Jian-Quan Yao

Author Affiliations +

Optical Engineering, Vol. 56, Issue 4, 044101 (April 2017). https://doi.org/10.1117/1.OE.56.4.044101

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.

Citation Download Citation

Maorong Wang, Kai Zhong, Chu Liu, Degang Xu, Wei Shi, and Jian-Quan Yao "Optical coefficients extraction from terahertz time-domain transmission spectra based on multibeam interference principle," Optical Engineering 56(4), 044101 (6 April 2017). https://doi.org/10.1117/1.OE.56.4.044101

Received: 5 January 2017; Accepted: 15 March 2017; Published: 6 April 2017

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