复介电双周期光子晶体的特性研究  

Characteristics of 1-D Dual-periodical Photonic Crystal with an Imaginary Part of Dielectric Constant Defect

作　　者：陈海波[1,2] 高英俊[2] 胡素梅[1] 

机构地区：[1]茂名学院物理系,广东茂名525000 [2]广西大学物理科学与工程技术学院,南宁530004

出　　处：《半导体光电》2009年第3期355-358,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(50661001);广西科学基金项目(桂科基0342004-1;桂科基0639004);广西"十百千人才工程"项目(2001207);广西研究生教育创新计划项目(200605930805M19)

摘　　要：利用传输矩阵法研究了复介电双周期光子晶体的带隙结构和光传输特性。研究发现:一维双周期光子晶体的光子带隙结构中在两光子晶体带隙交叠处具有很明显的两共振透射峰。当组成双周期光子晶体的一种介质为复介电且其虚部为负时,两共振透射模式都出现了较强的增益。随着复介电常量的虚部的增加,两透射增益先增加后减少,中间存在一极值点。而当组成双周期光子晶体的一种介质的复介电虚部为正时,表现为对两共振透射模式的吸收。这一结果为光子晶体同时实现双通道超窄带滤波器和光放大微器件提供了理论基础。By using the method of optical transfer maxtrix, the characteristics of photonic forbidden band of 1-D dual-periodical photonic crystal with an imaginary part of dielectric layer are studied. The investigation results show that two transmittance peaks exist at the crossover of the two photonic crystal PBG in 1-D dual-periodical photonic crystal. The large transmittance gains appear at transmittance peaks if the imaginary part of dielectric layer＇s dielectric constant is negative. With the increase of the absolute of the imaginary part, the transmittance gain increase firstly then decrease and in the middle the transmittance appears a gain apex. However, the transmittance peaks are absorbed if the imaginary part of dielectric constant is positive. The conclusion provides theoretical basis for the realization of dual-channeled narrow band filter and dual-channeled optical amplification device synchronously.

关 键 词：双周期光子晶体 传输矩阵法 复介电常量 共振透射峰 透射增益 

分 类 号：O431[机械工程—光学工程]