Conceived over 30 years ago, photoconductive (PC) emitters have proved essential in the development and spread of terahertz technology. Since then, not only have they been used extensively in a wide range of spectroscopic and imaging applications, they have also undergone significant improvements in performance, leading to their use for broadband or non-linear spectroscopy. In this review article, we provide an overview of the literature, highlighting the key milestones in the progression of the PC emitter. We also investigate the future of PC technology and review the existing challenges.

中文翻译：

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用于产生脉冲太赫兹的光电导发射器

30 多年前，光电导 (PC) 发射器已被证明对太赫兹技术的发展和传播至关重要。从那时起，它们不仅被广泛用于广泛的光谱和成像应用，而且在性能上也有了显着的改进，从而使它们用于宽带或非线性光谱。在这篇评论文章中，我们对文献进行了概述，重点介绍了 PC 发射器发展过程中的关键里程碑。我们还调查了 PC 技术的未来并回顾了现有的挑战。