近中红外与1.06μm和1.54μm激光兼容隐身光子晶体研究

Research on Compatible Stealth Photonic Crystal Against Near/Middle Infrared and 1.06 μm and 1.54 μm Lasers

为实现飞行器高温部分的红外与激光兼容伪装,设计了一种基于一维光子晶体的近中红外与1.06μm和1.54μm激光兼容隐身材料。基于薄膜的传输矩阵法和异质结构理论,拓展了光子晶体的禁带宽度,使之覆盖近中红外波段;随后,利用掺杂原理,在光子晶体周期结构中引入了两种缺陷。结果显示,在1~5μm的带隙中出现了波长分别为1.06μm和1.54μm的缺陷模,反射率分别为1.21%和1.79%,这种具有＂光谱挖空＂特性的光子晶体可以实现近中红外与1.06μm和1.54μm激光兼容隐身。

A compatible stealth material against near / middle infrared as well as 1. 06 μm and 1. 54 μm lasers,based on the structure of one-dimensional photonic crystal（ PC） was designed to achieve the compatible stealth of high temperature part of aircrafts against infrared and lasers. Based on the transfer matrix method（ TMM） of thin-film optical theory and heterogeneous structure theory,the forbidden band can be broadened to cover the near / middle infrared wave band. Then,two defects were added to the periodical structure of the PC according to the doping theory. The results show that there are two defect modes that located in the wavelengths of 1. 06 μm and 1. 54 μm in the band gap of 1-5 μm,respectively,with the corresponding spectral reflectance of 1. 21% and 1. 79%. This PC with ＂hole-digging spectrum＂can realize the compatible stealth against near / middle infrared as well as 1. 06 μm and 1. 54 μm lasers.