一种基于光子晶体结构防红外辐射涂层的研究  

Study on infrared radiation prevention coatings based on photonic crystal structure

作　　者：李文胜[1] 黄海铭[1] 付艳华[1] 张琴[1] 

机构地区：[1]湖北汽车工业学院,湖北十堰442002

出　　处：《激光与红外》2011年第12期1368-1372,共5页Laser & Infrared

基　　金：湖北省教育厅科研项目(No.B20111807)资助

摘　　要：为减少蒸气在管道传输中的能耗,针对蒸气所辐射的特征波长在4007.1～7765.7 nm的电磁波,选用常见的Si和SiO2为介质,并在考虑各自色散关系的基础上,设计了一种具有光子晶体结构的保温涂层。利用传输矩阵法计算表明:当两介质各取4层,其几何厚度分别取410.5 nm和972 nm时,在4450～7600 nm的范围内有一个严格的带隙,且具有较好的角度宽容度。当两介质的几何厚度增加,带隙红移,宽度增加,反之亦然。当涂层结构为ababa时,该光子晶体已在4597.2～7305.6 nm之间形成了严格的带隙,介质层数再增加,带隙没有实质性的变化,因此,涂层结构为ababa是最经济的。In order to reduce the energy consumption of the steam transmission in the pipeline, an insulating coating having photonic crystal structure is designed. The steam radiates electromagnetic waves with specific wavelengths of 4007.1-7765.7 nm. Common Si and SiO2 are used as the medium. Calculation using transfer matrix method shows that：when the two medium are of 4 layers respectively ,with geometric thickness of 410.5 nm and 972 nm respective- ly,there would be a strict band gap within 4450-7600 nm, and it has better angle tolerance. When the geometric thickness of two medium increases, the band gap would have red shifts and wider width, and vice versa. When the coating structure is ababa type, the photonic crystal forms a strict band gap between 4597.2 - 7305.6 nm. With the increasing medium layers, there would be no substantial change to the band gap, therefore, that ababa coating structure is the most economical.

关 键 词：红外辐射 涂层 能耗 光子晶体 传输矩阵 

分 类 号：O734[理学—晶体学]