Slow light effect with high group index and wideband by saddle-like mode in PC-CROW  

作　　者：Yong Wan Li-Jun Jiang Sheng Xu Meng-Xue Li Meng-Nan Liu Cheng-Yi Jiang Feng Yuan 

机构地区：[1]College of Physics Science, Qingdao University, Qingdao 266071, China [2]Qingdao No. 2 Middle School of Shandong Province, Qingdao 266071, China

出　　处：《Frontiers of physics》2018年第2期59-65,共7页物理学前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （Grant No. 11144007） and the Natural Science Foundation of Shandong Province （Grant No. ZR2016AM27）.

摘　　要：Slow light with high group index and wideband is achieved in photonic crystal coupled-resonator optical waveguides （PC-CROWs）. According to the eye-shaped scatterers and various microcavities, saddle- like curves between the normalized frequency f and wave number k can be obtained by adjusting the parameters of the scatterers, parameters of the coupling microcavities, and positions of the scatterers. Slow light with decent flat band and group index can then be achieved by optimizing the parameters. Simulations prove that the maximal value of the group index is 〉 104, and the normalized delay bandwidth product within a new varying range of ng 〉 102 or ng 〉 103 can be a new and effective criterion of evaluation for the slow light in PC-CROWs.Slow light with high group index and wideband is achieved in photonic crystal coupled-resonator optical waveguides （PC-CROWs）. According to the eye-shaped scatterers and various microcavities, saddle- like curves between the normalized frequency f and wave number k can be obtained by adjusting the parameters of the scatterers, parameters of the coupling microcavities, and positions of the scatterers. Slow light with decent flat band and group index can then be achieved by optimizing the parameters. Simulations prove that the maximal value of the group index is 〉 104, and the normalized delay bandwidth product within a new varying range of ng 〉 102 or ng 〉 103 can be a new and effective criterion of evaluation for the slow light in PC-CROWs.

关 键 词：eye-shaped scatterer slow light photonic crystal coupled-resonator optical waveguide 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论] Q959.7[自动化与计算机技术—计算机科学与技术]