摘要
在完整二维光子晶体中引入线缺陷后 ,就形成了光子晶体波导 ;将时域有限差分方法 (FDTD)用于光子晶体波导耦合研究 ,计算了不同耦合长度情形下的波导各个出口处的透过率 ,结果表明 :光子晶体波导耦合遵循普通介质波导耦合的一般规律 ,也有定向耦合的功能。进一步的研究表明 :对于不同的频率 ,光子晶体定向耦合器耦合系数是不同的 。
Photonic crystal coupling waveguide is developed when line defects are introduced into photonic crystals. The finite-difference time-domain (FDTD) method is applied for analyzing the waveguide coupling of 2-D square lattice photonic crystals. Transmitivity at exits of photonic crystal waveguide with different coupling length is given. Results indicate that photonic crystal waveguide coupling follows general regulation of conventional dielectric waveguide coupling. Further studies show that coupling coefficient of the photonic crystal waveguide directional coupler is different, coupling coefficient is linear with the corresponding frequency.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2003年第10期1237-1240,共4页
Acta Optica Sinica
