Open AccessHigh resolution continuous wave terahertz spectroscopy on solid-state samples with coherent detection
Author(s) -
Deyin Kong,
Xiaojun Wu,
Bo Wang,
Yang Gao,
Jun Dai,
Li Wang,
Cunjun Ruan,
Jungang Miao
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.017964
Subject(s) - terahertz radiation , terahertz spectroscopy and technology , optics , spectroscopy , fourier transform spectroscopy , frequency domain , materials science , terahertz time domain spectroscopy , interference (communication) , resolution (logic) , fourier transform infrared spectroscopy , physics , telecommunications , computer science , channel (broadcasting) , quantum mechanics , artificial intelligence , computer vision
We systematically investigate the data analysis methods in terahertz frequency domain spectroscopy (THz-FDS) with coherent detection. We demonstrate that the Hilbert transform method is one of the most appropriate for data processing in THz-FDS. By converting frequency-domain signal into time domain with further data processing, the system noise due to Fabry-Pérot (FP) interference is greatly restrained. Accurate permittivity of lactose monohydrate is successfully extracted under the condition of the existence of atmospheric water vapor. Our work greatly promotes the development of THz spectroscopy in practical applications.