TITLE:
Spectroscopy Studies on Stream Sediments in the Terahertz Range
AUTHORS:
Chen Chen, Jinsong Liu, Jianquan Yao
KEYWORDS:
Terahertz Time-Domain Spectroscopy, Stream Sediments, Absorption Coefficient, Refractive Index
JOURNAL NAME:
Optics and Photonics Journal,
Vol.6 No.8B,
August
25,
2016
ABSTRACT: In order to study stream sediments in the terahertz range, we have measured six reference stream sediment samples by terahertz time-domain spectroscopy (THz-TDS). We obtained the absorption coefficients and refractive indexes. By analyzing the spectra, we got different drops in amplitude and delays in time. The absorption and refractive properties of samples changed with its components and types. In addition, we also found there was a nearly linear relationship between the absorption coefficient and the frequency. We calculated the slope value (K) of each sample by linear fitting, and find the K was corresponding to the contents of the samples. The results showed THz-TDS was an effective method to the analysis of stream sediments.