一维金属微纳结构反激光器研究

Time reversed laser is also named coherent perfect absorber (CPA). Since its concept was proposed in 2010, CPA has become the focus of study due to the enormously potential application in optical communication, optical computer, etc., as a new method used to control light wave. However, so far those studies are mainly focus on the domain associated with non-metal structure. On the other hand, Micro-& Nano- structure consisted of global metal, controlling light in nano-size with the existence of evanescent wave, is of great significance to electro-optic integration and photonic integration. In term of these, studies on time-reversed laser based on Micro-& Nano- metal structure are proposed in this project. In which, numerical method including transfer matrix, finite-difference time-domain are performed to explore the structural parameters and optical properties of time-reversed laser constructed with single metal layer, one dimensional grating, metal-dielectric multilayer, and so on. Moreover, experiment on time-reversed laser is also carried on in this project. Surely the developing of the project is helpful to the deeply understanding of physical nature of CPA and the promotion of the application of CPA in photonic integration. So far, we have got some experiment on domain including the properties of Micro-& Nano- metal structure, principle of CPA and numerical method, building the foundation for the going of this project.

反激光器也称之为相干完美吸收体（CPA），由于可以作为一种操控光波的新方法在全光通信、光子计算机等领域具有巨大潜在应用，自2010年概念被提出后即成为研究热点，但目前文献报道的CPA研究主要以非金属介质结构为基础。另一方面，由于倏逝波等效应的存在，贵金属微纳结构可以在纳米尺度上实现光的调控，对电子/光子混合集成和纳米全光集成具有重要意义，金属微纳光子器件研究成为近年来的热点。由此，本项目提出金属微纳结构反激光器研究，利用传输矩阵、时域有限差分等数值方法对单层金属、一维金属光栅及金属/介质多层膜等结构构建反激光器的参数条件、特性规律进行探讨和研究，并同时在实验上展开相应的研究工作。项目的开展对深入理解CPA物理本质、推动CPA在纳米全光集成技术领域的应用都具有十分积极的意义。目前，我们已经在金属微纳结构光学特性、CPA形成原理以及数值计算方法等方面积累了相关经验，本项目的开展打下了基础。

项目提出微纳结构反激光器研究，利用传输矩阵、时域有限差分等数值方法对一维光栅及金属/介质多层膜等结构构建反激光器的参数条件、特性规律进行探讨和研究，并同时在实验上展开相应的研究工作。目前，该项目已顺利完成。在项目对一维光栅反激光器研究中发现，光栅反激光器比单层介质反激光器具有更好的特性，通过调节其参数，可以实现任何波长反激光效应。并且，其工作波长宽度范围相比单层介质的单波长特性更具应用优势。项目还更进一步将可见光波段反激光器研究延伸到THz波段，其研究表明，THz波段也可实现一维光栅反激光器。同时，基于反激光效应，项目对相应的新型传感器也作了研究。.项目负责人以第一作者发表项目相关SCI论文5篇，更深入的持续研究正在继续进展中。.项目的研究对深入理解CPA物理本质、推动CPA在纳米全光集成技术领域的应用都具有十分积极的意义。