The terahertz technique has wide application prospect and research value in fundamental research field,industrial and military applications.The terahertz source is an important factor to determine the prospects and development potential of terahertz technique.For the research and development of photoconductive material, the photoconductive terahertz source is an important way to generate broadband terahertz radiation.It is also a very active area among all related techniques in terahertz.This article makes a comprehensive review about principle, performance factors and research situation of photoconductive terahertz source, focusing on substrate material, electrode geometry and excitation source.The existing problems, the possible solutions and its future development are briefly reviewed and discussed.%太赫兹技术在基础研究、工业以及军事领域有着良好的应用前景和研究价值,而太赫兹源在很大程度上决定了太赫兹技术的应用前景和发展潜力.由于光电导材料的研究发展,光电导太赫兹源目前已成为产生宽频带太赫兹辐射的一种重要方法,也是所有太赫兹相关技术中研究非常活跃的一个领域.本文就光电导太赫兹源的原理、性能影响因素、国内外研究情况作了较为全面的评述,着重阐述了基底材料、电极几何结构和激发光源对于其性能的影响以及国内外研究现状,并对其中存在的问题和解决思路等进行分析,展望了未来研究发展方向.
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