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基于太赫兹量子级联激光器的实时成像研究进展

谭智勇 万文坚 黎华 曹俊诚

谭智勇, 万文坚, 黎华, 曹俊诚. 基于太赫兹量子级联激光器的实时成像研究进展[J]. 中国光学, 2017, 10(1): 68-76. doi: 10.3788/CO.20171001.0068
引用本文: 谭智勇, 万文坚, 黎华, 曹俊诚. 基于太赫兹量子级联激光器的实时成像研究进展[J]. 中国光学, 2017, 10(1): 68-76. doi: 10.3788/CO.20171001.0068
TAN Zhi-yong, WAN Wen-jian, LI Hua, CAO Jun-cheng. Progress in real-time imaging based on terahertz quantum-cascade lasers[J]. Chinese Optics, 2017, 10(1): 68-76. doi: 10.3788/CO.20171001.0068
Citation: TAN Zhi-yong, WAN Wen-jian, LI Hua, CAO Jun-cheng. Progress in real-time imaging based on terahertz quantum-cascade lasers[J]. Chinese Optics, 2017, 10(1): 68-76. doi: 10.3788/CO.20171001.0068

基于太赫兹量子级联激光器的实时成像研究进展

doi: 10.3788/CO.20171001.0068
基金项目: 

国家重点基础研究发展计划(973计划)资助项目 2014CB339803

国家自然科学基金资助项目 61131006

国家自然科学基金资助项目 61321492

国家自然科学基金资助项目 61575214

国家自然科学基金资助项目 61405233

国家自然科学基金资助项目 2011YQ150021

中科院创新团队国际合作伙伴计划:“高迁移率材料工程”创新团队项目以及上海市科学技术委员会 14530711300

中科院创新团队国际合作伙伴计划:“高迁移率材料工程”创新团队项目以及上海市科学技术委员会 15DZ0500103

详细信息
    作者简介:

    谭智勇(1982-), 男, 湖南宜章人, 博士, 副研究员, 硕士生导师, 2010年于中科院上海微系统与信息技术研究所获得博士学位, 主要从事太赫兹材料光谱及量子器件测试与应用方面的研究。E-mail:zytan@mail.sim.ac.cn

    通讯作者:

    曹俊诚, E-mail:jccao@mail.sim.ac.cn

  • 中图分类号: O434.3;O432.1+2;O436.2

Progress in real-time imaging based on terahertz quantum-cascade lasers

Funds: 

National Program on Key Basic Research Projects of China 2014CB339803

National Natural Science Foundation of China 61131006

National Natural Science Foundation of China 61321492

National Natural Science Foundation of China 61575214

National Natural Science Foundation of China 61405233

Major National Development Project of Scientific Instrument and Equipment 2011YQ150021

International Collaboration and Innovation Program on High Mobility Materials Engineering of the Chinese Academy of Sciences, and the Shanghai Municipal Commission of Science and Technology 14530711300

International Collaboration and Innovation Program on High Mobility Materials Engineering of the Chinese Academy of Sciences, and the Shanghai Municipal Commission of Science and Technology 15DZ0500103

More Information
  • 摘要: 太赫兹(THz)实时成像是THz技术中颇具潜力的一个领域,具有成像速度快、成像分辨率高等特点,基于THz量子级联激光器(QCL)的实时成像系统是其中最重要的一种,系统体积小、重量轻、成像信噪比高等特点使其在实际应用中具有独特的优势。本文主要介绍了THz QCL器件及其实时成像系统的研究进展,采用超半球高阻硅透镜改善了THz QCL的输出激光,实现了准高斯光束输出,搭建了基于二维摆镜消干涉技术的THz实时成像系统,单帧成像光斑面积45 mm×30 mm,实现了对刀片、药片的实时成像演示,成像分辨率优于0.5 mm;最后对成像系统激光源、成像光路和探测端的改进以及成像效果的改善方面进行了综述,并探讨了THz实时成像系统未来的发展趋势及其在材料分析和生物医学成像方面的应用前景。
  • 图  1  THz量子级联激光器工作原理示意图

    Figure  1.  Schematic diagram of working principle of terahertz quantum-cascade laser

    图  2  不同时期THz QCL的最高工作温度

    Figure  2.  Maximum operating temperature of THz QCL in different years

    图  3  纸质信封中铅笔字可见光照片(a)及其在封闭信封内THz透射(b)和反射(c)成像效果对比和大拇指指纹的可见光照片(d)和THz反射成像(e)效果对比[15]

    Figure  3.  Pencil letters written on inside of paper security envelope at visible frequencies. (a) Terahertz transmission mode, (b) one frame, and (c) terahertz reflection mode. (d) Visible frequency thumb print and (e) terahertz reflection mode image of thumb[15]

    图  4  干钟荚的可见光(a)照片和THz实时成像结果(b)[31]

    Figure  4.  Visible photo (a) and THz image (b) of a dried seed pod (down) [31]

    图  5  经过反射镜后返回的THz光、红外光和可见光成像光斑对比图[33]

    Figure  5.  Comparison of the returning light through the reflecting mirror at terahertz, longwave infrared and visible frequencies (a) without black smoke, (b) with black smoke[33]

    图  6  头发丝(a)和微管中乙醇和水(b)的THz显微实时成像结果[8]

    Figure  6.  Real-time THz microscope imaging of human hair (a) and ethanol and water (b)[8]

    图  7  单面金属波导THz QCL输出激光经过离轴抛物面镜后的二维分布图

    Figure  7.  Beam pattern of the terahertz light emitting from a single facet metal waveguide with an off-axis parabolic mirror

    图  8  未采用(a)和采用(b)二维摆镜消干涉部件后对头发丝、金属丝样品的实时成像[38]

    Figure  8.  Real-time imaging of human hair and metal wire without (a) and with (b) two dimensional wobbling mirrors[38]

    图  9  经过超半球高阻硅透镜耦合输出后的准高斯束二维能量分布图

    Figure  9.  Two dimensional energy distribution of quasi-Gaussian THz light beam collimated by a hyper-hemispherical high-resistivity silicon lens

    图  10  基于小型斯特林制冷机的THz QCL光源装置(插图)及其输出功率曲线

    Figure  10.  Stirling cooler based THz QCL light source apparatus (inset) and its light power curve with the drive current

    图  11  刀片和不同大小药片的THz实时图像

    Figure  11.  THz real-time images of blade and tablets with different sizes

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  • 收稿日期:  2016-09-19
  • 修回日期:  2016-10-12
  • 刊出日期:  2017-02-01

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