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[an error occurred while processing this directive] 中国光学 2010, 15(3) 209-222  ISSN: 2095-1531 CN: 1400/O4

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空间光学
太赫兹技术及其应用研究进展
蔡 禾;郭雪娇;和 挺;潘 锐;熊 伟;沈京玲
首都师范大学 物理系,北京市THz波谱与成像重点实验室, THz光电子学教育部重点实验室,北京100048
摘要

概述了利用光整流、光电导天线、参量振荡、空气等离子体等方式产生太赫兹(THz)波,以及利用电光取样、光电导天线、空气等离子体等探测THz波的方法。阐述了THz时域光谱技术以及近年来发展的异步电光取样技术。讨论了THz技术在各领域的应用。重点介绍了本课题组近年来致力于THz检测技术在毒品检测识别方面的研究情况。建立了含有38种纯度在90%以上的THz毒品谱库,并采用人工神经网络、支持向量机等方法对毒品进行计算机自动识别,研究确定了毒品纯度和有效成分含量的理论和实验方法。用高斯软件对个别品种,如甲基苯丙氨(MA)、氯氨酮、海洛因进行了光谱解析,研究结果为实现毒品的实验室检测提供了依据。最后,简单综述了THz技术的发展前景。

关键词 THz波   无损检测   光谱分析   异步电光取样   综述  
Terahertz wave and its new applications
CAI He;GUO Xue-jiao;HE Ting;PAN Rui;XIONG Wei;SHEN Jing-ling
Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics,Ministry of Education, Department of Physics,Capital Normal University,Beijing 100048,China
Abstract:

The methods to generate the terahertz wave by optical rectification, photoconductive antennas, air plasmas and parametric generators are described in detail, then how to detect the terahertz wave by electro-optic sampling, photoconductive antennas and air plasmas are introduced as well. The terahertz time-domain spectroscopy and the asynchronous electro-optic sampling technique are also described. Furthermore, the applications of the terahertz technology to research fields, especially to the detection and identification of drugs are discussed. A terahertz spectrum database includes 38 kinds of drugs with a purity more than 99% is established. Moreover, the Artificial Neural Network(ANN) and a support vector machine are used to identify drugs automatically and the experimental methods and related theory are proposed to determine the purity and effective ingredients of drugs. By using a Gaussian software, individual species of drugs such as methyl-phenyl ammonia(MA), ketamine and heroin are conducted by spectral analysis, which provides a basis for implementing the drug inspection in laboratories. Finally, this paper reviews the developments of the terahertz technology briefly.

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收稿日期 2010-01-11 修回日期 1900-01-01 网络版发布日期  
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