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

作者：Wan, Yong; Ge, Xiao-Hui; Xu, Sheng; Guo, Yue; Yuan, Feng^*

来源：Frontiers of Physics, 2017, 12(1): 124204.

DOI：10.1007/s11467-016-0598-x

• moon-like scatterer
• slow light
• coupled waveguide
• photonic crystal

Ultraslow-light effects in two-dimensional hexagonal-lattice coupled waveguide with moon-like scatterers 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 x 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 x 10(5) with a "saddle-like" relationship between the frequency and group index.

• 出版日期2017-2
• 单位青岛大学