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Feature extraction without phase error for THz reflective spectroscopy

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Abstract

We propose two methods for avoiding misplacement phase error in terahertz reflection time-domain spectroscopy (THz-RTDS). The absorption signatures of the materials are extracted directly from the second-order derivative of the phase of the sample beam or the first derivative of the relative reflectance with respect to frequency. The techniques provide straightforward and fast solutions to solve the phase-retrieval problem in RTDS.

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Authors and Affiliations

  1. Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education of China, Capital Normal University, Beijing, 100048, China

    LiangLiang Zhang, Hua Zhong, DeChong Zhu, Jian Zuo & CunLin Zhang

Authors
  1. LiangLiang Zhang
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  2. Hua Zhong
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  3. DeChong Zhu
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  4. Jian Zuo
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  5. CunLin Zhang
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Correspondence to CunLin Zhang.

Additional information

ZHANG LiangLiang was born in 1979. She received the Ph.D. degree from Beijing Institute of Technology, Beijing in 2008. Currently, she is a senior researcher at Capital Normal University. Her research interests include Terahertz spectroscopy and imaging.

ZHANG CunLin was born in 1961. He received the Ph.D. degree from Beijing Institute of Technology, Beijing in 1992. Currently, he is a senior researcher at Capital Normal University. His research interests include Terahertz spectroscopy and imaging. Dr. Zhang is director of Key Lab of THz Optoelectronics of Ministry of Education and vice chairman of Beijing Physical Society.

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Zhang, L., Zhong, H., Zhu, D. et al. Feature extraction without phase error for THz reflective spectroscopy. Sci. China Inf. Sci. 55, 127–132 (2012). https://doi.org/10.1007/s11432-011-4519-x

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  • DOI: https://doi.org/10.1007/s11432-011-4519-x

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