一维类梳状光子晶体中的缺陷模研究  

Defect Modes in One-dimensional Comblike Photonic Crystals

作　　者：夏辉[1] 彭景翠[1] 张波云[2] 李宏建[1] 翦之渐[1] 周仁龙[1] 

机构地区：[1]湖南大学应用物理系,湖南长沙410082 [2]湖南公安高等专科学校,湖南长沙410006

出　　处：《光谱学与光谱分析》2002年第5期734-737,共4页Spectroscopy and Spectral Analysis

摘　　要：本文研究了一种一维类梳状光子晶体的带结构及缺陷态对带隙的影响。发现这种结构的带隙来源于结构的周期性及所接分支所形成的共振态。通过移去或插入一定数目的缺陷分支在带隙中将形成局域态 ,通过对透射系数的研究 ,发现局域态以窄的尖峰形式出现在透射谱中 ,并且 ,局域态的性质与所接缺陷的数目。The photonic band structures and the effect of defect states on photonic band gap in a comblike waveguide geometry which were made of dangling side branches grafted periodically along an infinite monomode waveguide were investigated in this paper. It was discovered that the photonic forbidden bands originates from both the periodicity of the system and the resonance states of the grafted branches. By removing or inserting some defect branches in the star waveguide of finite number of grafted branchs, the localized states appear in the transmission spectrum as very narrow pea. The behavior of the localized states was analyzed as the functions of the length, the position and the number of the defective branches.

关 键 词：一维类梳状光子晶体 带隙 局域态 缺陷 

分 类 号：O77[理学—晶体学]