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Hilbert-Transform-Based Accurate Determination of Ultrashort-Time Delays in Terahertz Time-Domain Spectroscopy

文献类型：期刊论文

作者Chang, Tianying1,2; Guo, Qijia1; Liu, Lingyu2; Cui, Hong-Liang1,3
刊名IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
出版日期2017-09-01
卷号7期号:5页码:514-520
关键词Hilbert transform (HT) terahertz time-domain spectroscopy (THz-TDS) time-delay determination
ISSN号2156-342X
DOI10.1109/TTHZ.2017.2713602
通讯作者Chang, TY (reprint author), Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130061, Jilin, Peoples R China.
英文摘要Accurate determination of time delays is crucial for distinguishing a sample's different interfaces in terahertz timedomain spectroscopy (THz-TDS), especially for ultrathin samples or interfacial gaps. In this paper, Hilbert transform (HT) is invoked, along with posttransform signal spectral estimation of several varieties, including the conventional, that based on multiple-signal classification spectrum estimation (HT-MUSIC), and that based on autoregressive spectrum estimation using Yule-Walker law (HTAR), to determine the sample's different interfaces. The results are compared with the traditional method of obtaining time delays in THz-TDS, along with analysis of the resolution and accuracy, as well as advantages and deficiencies of the various approaches. It is demonstrated that HT is an effective method for determining different interfaces of an ultrathin sample by simulation and experiments. The simulation results show that MUSIC-HT has the best resolution, at about 0.35 ps and AR-HT has the best accuracy, whose error is less than 0.075 ps. Experimental results for ultrathin air gaps and polymer films confirmed that MUSIC-HT can distinguish time delays as short as 0.44 ps from the THz time-domain spectra.
资助项目Youth Science Funds of the Shandong Academy of Sciences ; Department of Science and Technology of the Shandong Province[2016GGX101010] ; Department of Science and Technology of the Shandong Province[2015GGX101030] ; Innovation Program of the Shandong Academy of Sciences
WOS研究方向Engineering ; Optics ; Physics
语种英语
WOS记录号WOS:000411090900004
出版者IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
源URL[http://172.16.51.4:88/handle/2HOD01W0/163]  
专题太赫兹技术研究中心
通讯作者Chang, Tianying
作者单位1.Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130061, Jilin, Peoples R China
2.Shandong Acad Sci, Inst Automat, Jinan 250014, Shandong, Peoples R China
3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Chang, Tianying,Guo, Qijia,Liu, Lingyu,et al. Hilbert-Transform-Based Accurate Determination of Ultrashort-Time Delays in Terahertz Time-Domain Spectroscopy[J]. IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY,2017,7(5):514-520.
APA Chang, Tianying,Guo, Qijia,Liu, Lingyu,&Cui, Hong-Liang.(2017).Hilbert-Transform-Based Accurate Determination of Ultrashort-Time Delays in Terahertz Time-Domain Spectroscopy.IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY,7(5),514-520.
MLA Chang, Tianying,et al."Hilbert-Transform-Based Accurate Determination of Ultrashort-Time Delays in Terahertz Time-Domain Spectroscopy".IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY 7.5(2017):514-520.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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