Ultraslow-light effects in symmetric and asymmetric waveguide structures with moon-like scatterers  

作　　者：Yong Wan Xiao-Hui Ge Sheng Xu Yue Guo Feng Yuan 

机构地区：[1]College of Physics Science, Qingdao University, Qingdao 266071, China

出　　处：《Frontiers of physics》2017年第1期117-121,共5页物理学前沿（英文版）

基　　金：Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant Nos. 11144007 and 61307050）.

摘　　要：Ultraslow-light effects in two-dimensional hexagonal-lattice coupled waveguide with moon-like scat- terers were theoretically studied using the plane-wave expansion method. For symmetric structures, simulations showed that slow light with high group index can be achieved by shifting the scatterers and adjusting the radius of moon-like scatterers. The maximum group index was over 8.0 × 10^4. For asymmetric structures, simulations showed that slow light with flat band and high group index can be obtained by shifting the scatterers, adjusting the radius of moon-like scatterers, and rotating the scatterers. The maximum group index was over 5.7 ×10^5 with a ＂saddle-like＂ relationship between the frequency and group index.Ultraslow-light effects in two-dimensional hexagonal-lattice coupled waveguide with moon-like scat- terers were theoretically studied using the plane-wave expansion method. For symmetric structures, simulations showed that slow light with high group index can be achieved by shifting the scatterers and adjusting the radius of moon-like scatterers. The maximum group index was over 8.0 × 10^4. For asymmetric structures, simulations showed that slow light with flat band and high group index can be obtained by shifting the scatterers, adjusting the radius of moon-like scatterers, and rotating the scatterers. The maximum group index was over 5.7 ×10^5 with a ＂saddle-like＂ relationship between the frequency and group index.

关 键 词：moon-like scatterer slow light coupled waveguide photonic crystal 

分 类 号：TN011[电子电信—物理电子学] P444[天文地球—大气科学及气象学]