Flat broadband slow light with low dispersion in coupled resonator optical waveguide based on one-dimensional photonic crystals  

作　　者：李长红 万勇 于瑞涛 

机构地区：[1]College of Automation Engineering, Qingdao University [2]College of Physics Science, Qingdao University

出　　处：《Optoelectronics Letters》2014年第5期395-400,共6页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61307050 and 11144007);the Natural Science Foundation of Shandong Province(No.BS2012CL012)

摘　　要：By introducing multiple defect layers in one dimensional(1D) photonic crystal(PC), the broadband slow light with low dispersion is obtained. The slow light pass band is smoothed by adjusting the spacing and the number of cavities. In the optimized structure, the bandwidth is 8.556 1 nm with flatness below 8.805 2×10-4, the group velocity is in the range from 0.029 c to 0.042 4c, and the group velocity dispersion(GVD) parameter D is in the range from-14.410 3 ps/(mm·nm) to 15.124 ps/(mm·nm). Moreover, by material optimization, the slow light properties can be improved further. With suitable materials, the slow light pass band can be broadened to 20.057 8 nm with flatness of 5.4×10-3, and the GVD parameter D decreases to the range from-4.657 8 ps/(mm·nm) to 4.790 4 ps/(mm·nm).By introducing multiple defect layers in one dimensional （1D） photonic crystal （PC）, the broadband slow light with low dispersion is obtained. The slow light pass band is smoothed by adjusting the spacing and the number of cavities. In the optimized structure, the bandwidth is 8.5561 nm with flatness below 8.805 2× 10-4, the group velocity is in the range from 0.029c to 0.042 4c, and the group velocity dispersion （GVD） parameter D is in the range from -14.410 3 ps/（mm.nm） to 15.124 ps/（mm.nm）. Moreover, by material optimization, the slow light properties can be improved further. With suitable materials, the slow light pass band can be broadened to 20.057 8 nm with flatness of 5.4x103, and the GVD parameter D decreases to the range from -4.657 8 ps/（mm.nm） to 4.790 4 ps/（mm.nm）.

关 键 词：一维光子晶体 分散性 耦合谐振 宽带 光波导 群速度色散 平坦 材料优化 

分 类 号：TN252[电子电信—物理电子学]