基于多谐振子微纳结构的宽谱吸收器辐射特性调控机理研究

Micro and nanoscale structures can well control radiation transfer, which are suitable for developing novel high-performance broadband radiation absorbers. As a potential method for enhancing absorption, multi-resonantors can excite multiple absorptive peaks to broaden the absorptivity spectrum. However, micro and nanoscale structures with multi-resonators is relatively complicated, and few published works have been investigated them. It is necessary to reveal the profound mechanism in controlling radiative properties behind various radiation transfer processes. By theoretical analysis, numerical simulation and experimental measurement, this project will investigate mechanism in controlling radiative properties of broadband absorbers based on micro and nanoscale structures with multi-resonators systematically. Meanwhile, micro and nanoscale structures with multi-resonators for broadband absorbers will be simplified and optimized. The project will produce theory and design method to promote the development of novel high-performance broadband radiation absorbers.

微纳结构优异的辐射传输调控性能，非常适合用来开发出新型高效的宽谱辐射吸收器。作为一种可行的增强吸收方案，采用多个谐振子的叠加能够产生多个吸收峰以增宽吸收光谱实现高效吸收。然而，考虑到多谐振子微纳结构相对复杂，现有的研究并未对其进行深入地探讨，其中丰富的辐射传输过程蕴含深刻的吸收机理亟待揭示。本项目将从理论分析、数值模拟和实验测试三方面，对多谐振子微纳结构的辐射特性调控机理展开系统而深入地研究，同时优化及简化用于宽谱吸收器的多谐振子微纳结构。该研究将为开发新型高效的宽谱辐射吸收器提供理论支撑和设计方法。

本研究通过采用多个谐振子的叠加能够产生多个吸收峰以增宽吸收光谱实现高效吸收，为开发新型高效的宽谱辐射吸收器提供理论支撑和设计方法。本项目研究了粒子分布、粒子各项异性对传输和表面辐射特性的影响，开发设计了堆叠式介电金属宽谱吸收器，制备了粒状纳米粒子。此外，研究了各种优化方法，为微纳结构辐射特性优化提供支撑。