Micro-lasers: optical field modulation and application
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摘要: 微纳激光器是谐振腔尺寸为微/纳米量级的激光器，其模式体积在波长或亚波长尺度，具有小尺寸、易集成、低阈值、宽波段、可调谐等特点，在光芯片上光信息的产生、传输、耦合、调制、探测等功能实现中占据核心位置，是微纳光学领域的重要前沿．微纳激光的光场特性与其应用研究息息相关，为了实现微纳激光光源的多功能化，研究人员从微纳激光光场调控的理论机制和实验测试、器件应用方面展开研究并取得了一系列进展．本文聚焦于这两方面，概述了微纳激光器的相关研究进展，着重阐述了通过泵浦、增益和谐振腔3条研究路径来调控激光性能的方法，总结微纳激光器在传感、防伪、成像与显示等领域的应用进展，并对其发展趋势进行了展望．Abstract: Micro-lasers with micro/nano scale cavities have mode volume at wavelength or sub-wavelength scale, which are characterized with small size, easy integration, low threshold, wide band, tenability. Micro-lasers play a core role in the generation, transmission, coupling, modulation, detection and other functions of optical information on photonic chips, which is an important frontier in the field of micro/ nano optics. The application research of micro-lasers are related to their optical field characteristics. In order to realize the multi-functional application of micro-lasers, studies on optical field modulation of micro-laser have been conducted, referring to theory, experimental and device application. Here, the research progress of micro-lasers are summarized from optical field modulation and application. The modulating methods based on pumping light, gain and micro-cavity are emphatically described. The application progress of micro-lasers in sensing, anti-counterfeiting, imaging and display fields is summarized. And the future research direction is prospeced.
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图 1 微纳激光器的光反馈示意
a 法布里-珀罗（F-P）微腔激光器的光反馈；b 分布反馈（DFB）激光器的光反馈；c 回音壁模式（WGM）激光器的光反馈；d 随机（Random）激光器的光反馈．
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