高品质因子和高传输效率的二维光子晶体耦合腔波导研究

基于时域有限差分方法, 通过仿真计算设计了一种具有较高品质因子和传输效率的二维光子晶体耦合腔波导结构。通过改变二维光子晶体波导微腔结构中隔绝波导与微腔的空气孔的半径和数量, 在获得近似90%的传输效率的同时, 使得品质因子达到了8.20×104。为了使品质因子在大幅度提高的同时, 传输效率只有小幅度的降低, 在波导微腔结构中引入了链式微腔。将链式微腔结构与传统的波导微腔结构相结合, 使这种新形式的耦合腔结构的品质因子提高了1个数量级, 传输效率仅下降了约40%。

Abstract

We present a design of 2D photonic crystal coupled-cavity waveguide with a high transmission efficiency and a quality factor simultaneously. By optimizing the structural parameters such as amount and radius of air holes between microcavities and waveguide, a 90% transmission efficiency is obtained with a Q factor of 8.20×104. In order to increase Q factor without sacrificing too much efficiency, a new kind of coupled-cavity waveguide is formed by introducing microcavity chains. Photons hop in adjacent microcavies. For this new kind of waveguide, Q factor is improved one order higher and transmission efficiency only decrease by 40%. The result has a practical gui-ding significance for application of photonic crystal in various different fields such as slow light, light trap, optical transmission.

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吕冬妮, 沈宏君, 余建立. 高品质因子和高传输效率的二维光子晶体耦合腔波导研究[J]. 发光学报, 2012, 33(11): 1241. LV Dong-ni, SHEN Hong-jun, YU Jian-li. The Study on High Q Factor and High Transmission Efficiency of Two-dimensional Photonic Crystal Coupled Cavity Waveguide[J]. Chinese Journal of Luminescence, 2012, 33(11): 1241.

高品质因子和高传输效率的二维光子晶体耦合腔波导研究

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