高反射、高透射和高Q谐振的纳米光栅结构设计及物理分析

摘要

Nano-grating is a novel subwavelength artificial surface with spatial modulation function for both phase and amplitude of the incident light. The incident light can be reflected, transmitted or resonated from the artificial surface. A highly reflective nano-grating structure was designed, and its inherent physical mechanism of high reflection was analyzed. The results show that the nano-grating has two main propagation modes. And due to the interaction between the two modes, nano-grating demonstrates high reflection, high transmission, high-Q resonance and other physical phenomena.%为了得到一种对入射光的相位、振幅有空间调制作用的新型亚波长人工表面,入射光能够从该人工表面反射、透射或者谐振,以纳米光栅为基本结构,设计了高反射纳米光栅,并重点对纳米光栅实现高反射的物理机理进行了分析,指出纳米光栅的传播模式中主要存在2个模式. 由于2个模式的相互作用,产生了高反射、高透射以及高Q谐振等物理现象. 结果表明:高反射和高透射纳米光栅的反射率和透射率均超过99%,高Q谐振纳米光栅的品质因子超过108.