太赫兹参量辐射源研究进展

Research progress of terahertz parametric radiation sources

摘要:

基于受激电磁耦子散射(SPS)的太赫兹参量辐射源是一种光学相干太赫兹辐射源，具有高相干性、频率可调谐、室温运转等优点。本文首先介绍了基于受激电磁耦子散射的基本原理、常用的非线性晶体和耦合技术，重点总结了近年来国内外在增益提升和输出性能提升方面的典型技术与研究成果，以及太赫兹辐射源在物质浓度检测中的应用研究进展，最后分析了太赫兹参量辐射源的关键技术问题以及发展趋势。

Abstract:

A terahertz parametric radiation source based on Stimulated Polariton Scattering(SPS) is an optically coherent terahertz source, characterized by high coherence, frequency tunability, and operation at room temperature. The basic principle of terahertz parametric radiation based on SPS, commonly used nonlinear crystals, and coupling techniques are firstly introduced. Then typical techniques and research achievements in recent years, both domestical and international, are summarized regarding gain enhancement and output performance improvement. Additionally, the progress in the application of terahertz radiation sources in material concentration detection is reviewed. Finally, the key technical issues and development trends of terahertz parametric radiation sources are analyzed.