Abstract-An different optical path scheme to improve parameters extraction in terahertz frequency

Li Dehua, Ji Beibei, Zhou,Li Zhaoxin, Song Binbin,  Guo Xiangshuai,

https://ieeexplore.ieee.org/search/searchresult.jsp?queryText=(terahertz)&ranges=2017_2018_Year&matchBoolean=true&searchField=Search_All


In this paper, a more accurate material parameters extracting method, the different optical path method (DOP), was theoretically derived and experimentally demonstrated. A HDPE sample was measured to compare the DOP method with regular terahertz spectroscopy. The results show that DOP can reveal some of absorption line which can't be revealed by the normal terahertz spectroscopy, and can carry out a more precious measurement of material parameters.