摘要
研究了三角形二维光子晶体的带隙随结构参数的变化规律。计算表明 ,对于空气柱等边三角形二维光子晶体 ,当介电常数比为 13:1时 ,最佳填充比为 0 .78,最大带宽是 0 .0 94 (Δωa/2πc) ;当填充比固定时 ,介电常数比大于 8才会有带隙出现 ,且介电常数比越大 ,带隙越宽 ;两个晶格矢量的夹角与最佳夹角偏离 60° ,向上最大达到 74°、向下最大达到 4 6°时带隙消失。
In this paper, the variation of band structure with parameters of PBG(Photonic band gap) material is given. The results of calculation show that the optimal filling factor is 0.78 for equilateral triangular two-dimension photonic crystal when dielectric constant ratio is 13:1,and the widest band gap is 0.094(Δωa/2πc). At a fixed filling factor of 0.78, only when the dielectric constant ratio is larger than 8,will there be a band gap;and the larger the ratio is,the wider the band gap will be.As the angle included between the two primitive translation vectors of the crystal, deviates from its optimal value 60° up to 74° or down to 46°,a band gap will vanish.
出处
《半导体光电》
EI
CAS
CSCD
北大核心
2000年第3期214-217,共4页
Semiconductor Optoelectronics
基金
国家重大基金资助项目! (6 9896 2 6 0 )
国家自然科学基金资助项目! (6 97770 0 5 )
关键词
光子晶体
带隙材料
能带结构
photonic crystal
band gap material
band structure
