红外, 2011, 32 (7): 17, 网络出版: 2011-07-25
低损耗高带宽金属光子晶体弯波导的设计
Design of Low-loss and Wide-band Metallic Photonic Crystal Bend Waveguides
光子晶体 二维光子晶体波导 时域有限差分 金属 photonic crystal two-dimensional photonic crystal waveguides finite difference time domain (FDTD) metal
摘要
设计了一种采用金属材料的二维光子晶体波导。针对金属的色散特性，运用时域有限差分方法对3种 二维结构的90转弯波导的TM波传播特性进行了研究。给出了在合适的填充率下，转弯效率随周期变化的曲 线。最后对其中较优的一种结构作了进一步优化，使其3 dB时的带宽达到了99 nm，目标波长处的转弯效率达到了98.2 %。该结构 的主要参数为：晶格常数1.190 m，金属柱直径R=0.809 m。
Abstract
A two-dimensional photonic crystal waveguide using metal is designed. The transmission characteristics of TM wave in three kinds of two-dimensional 90 bend waveguides are investigated by using the finite difference time domain (FDTD). The curves of transmission efficiency changed with the period at an appropriate filling factor are given. Finally, the best structure among the waveguides is further optimized to have a bandwidth of 99 nm at 3 dB and a transmission efficiency of 98.2 % at the target wavelength. The lattice constant α and the diameter of the metal pillar R in the structure are 1.190 m and 0.809 m respectively.
杨波, 梁静秋, 梁中翥, 崔乃迪, 周建伟, 王维彪. 低损耗高带宽金属光子晶体弯波导的设计[J]. 红外, 2011, 32(7): 17. YANG Bo, LIANG Jing-qiu, LIANG Zhong-zhu, CUI Nai-di, ZHOU Jian-wei, WANG Wei-biao. Design of Low-loss and Wide-band Metallic Photonic Crystal Bend Waveguides[J]. INFRARED, 2011, 32(7): 17.
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