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테라헤르츠 차동 시영역 분광

Title
테라헤르츠 차동 시영역 분광
Authors
노양균
Date Issued
2011
Publisher
포항공과대학교
Abstract
We report artifacts in THz differential time domain spectroscopy (THz DTDS). Demodulation process of lock-in amplifier (LIA) in THz DTDS is analyzed and it is found that low frequency noise arises from the digital sampling using optical delay line. We studied the characteristic of the low frequency noise and also analyzed demodulation factor, which is detection efficiency of the LIA. A quantitative model of demodulation factor is described and verified experimentally. The system sensitivity and accuracy have been improved by reducing the artifacts due to the low frequency noise and the demodulation factor.
URI
http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000000936220
http://oasis.postech.ac.kr/handle/2014.oak/1146
Article Type
Thesis
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