基于二维矩形SiO_2光子晶体光栅的研究  

SiO_2 photonic crystal grating based on 2-D rectangular

作　　者：卢辉东[1] 张瑞[1] 沈宏君[1] 

机构地区：[1]宁夏大学物理电气信息学院,宁夏银川750021

出　　处：《应用光学》2012年第4期698-702,共5页Journal of Applied Optics

基　　金：国家自然科学基金(61167002);宁夏自然科学基金(NZ1046)

摘　　要：为解决光学系统中普遍存在的菲涅耳反射问题,提高光的透射率,设计了一种二维矩形SiO2光子晶体结构光栅。采用勒让德多项式展开法对该结构在可见-近红外波长范围入射光波的透射率进行了模拟计算,寻找到了合适的占空比e、光栅深度h和基底厚度d,使得光栅的透射率在入射角为0～60°范围内、入射波长在400nm～1 200nm范围内变化时,其透射率的变化相对稳定,透射率的平均值可达到96%以上。In order to improve the light transmittance and solve the Fresnel reflection problem which is common in optical systems, we designed a two-dimensional rectangular SiO2 photonic crystal surface grating structure. Using the Legendre polynomial expansion method to calculate the transmittance in the visible-near infrared wavelength range of the incident light wave of the structure, we found the appropriate duty cycle e, the grating depth h, and the substrate thick- ness d, which could stabilize the change of transmission rate and make the average rate reach over 96% when the incident angle varied in the range of 0-60° and the incident wave length in the range of 400 nm-1200 nm.

关 键 词：光子晶体光栅 勒让德多项式展开法 透射率 

分 类 号：O482.3[理学—固体物理]