立体耦合光子晶体薄板微腔的高Q值特性研究  

The characteristic of the stero-coupling high-Q photonic crystal slab cavity

作　　者：江斌[1] 刘安金[1] 陈微[1] 邢名欣[1] 周文君[1] 郑婉华[1] 

机构地区：[1]中国科学院半导体研究所

出　　处：《物理学报》2010年第12期8548-8553,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2006CB921705);国家自然科学基金(批准号:10634080;60677046;60838003);国家高技术研究发展计划(批准号:2007AA03Z410;2007AA03Z408)资助的课题~~

摘　　要：利用微腔之间的立体耦合,提出了基于无源材料硅的双层光子晶体薄板H1(DLPCS-H1)腔,薄板之间为空气层.使用三维时域有限差分方法和Padé近似方法分析了DLPCS-H1腔的偶极模的场分布和品质因子.通过对中间空气层高度的优化使DLPCS-H1腔的偶极模的品质因子得到了显著的提高,大约为单层光子晶体薄板H1腔的偶极模的品质因子的4倍.此外,还研究了三层光子晶体薄板H1腔,它的偶极模的品质因子约为单层光子晶体薄板H1腔的偶极模的品质因子的7倍.Inspired by the idea of the stero-coupling,we propose a new sandwich-like photonic crystal microcavity which is composed of double layer photonic crystal slabs H1（DLPCS-H1） cavity with an air layer in between.We calculate the electromagnetic field distribution and the quality factor of the dipole mode by the three-dimensional finite-difference time-domain method and the Padé approximation method.Through carefully analyzing the effect of the air layer height on the quality factor of the dipole mode,we obtain an optimized DLPCS-H1 cavity in which the height of intermediate air layer is about 0.5a（a is the lattice constant,a = 420 nm）.In this cavity,the quality factor of the dipole mode is 4 times as large as that of the conventional single layer photonic crystal slab H1 cavity.Furthermore,we study the three-layer photonic crystal slabs H1 cavity,and the quality factor of its dipole mode is increased over 7 times.

关 键 词：双层光子晶体薄板微腔 偶极模 品质因子 Padé近似 

分 类 号：O734[理学—晶体学]