摘要
利用光子晶体的概念和时域有限差分方法计算了当光折变材料的空间折射率呈一维正弦变化时其内部的带隙结构情况,表明在光折变材料中存在极窄的光子带隙。最后讨论了折射率(n)、折射率调制幅度(△n)、周期长度(D)及周期数(N)对光子带隙的影响。
In this paper, the photonic band gap is calculated by means of finite difference time domain method when the distribution of refractive index satisfies sine function, and the concept of photonie crystal is used at the same time. It is indicated that the band gap exists in photorefractive materials. At last, it studies the influence of the photonic band gap on the refractive index, the refractive-index modulation amplitude, the length of period and the number of period.
出处
《量子光学学报》
CSCD
北大核心
2007年第1期47-51,共5页
Journal of Quantum Optics
关键词
光子晶体
光子带隙
时域有限差分方法
光折变材料
窄带滤波器
finite difference time domain method
photonic crystal
photonic band gap
photorefractive materials
narrow-band filter
