中国物理B ›› 2024, Vol. 33 ›› Issue (11): 118701-118701.doi: 10.1088/1674-1056/ad7fd2
Topological slow light and rainbow trapping of surface wave in valley photonic crystal bounded by air
Shuheng Chen(陈书恒)1,2, Yi Qi(齐奕)1,2, Yucen Li(李昱岑)1,2, Qihao Wang(王琪皓)1,2, and Yuanjiang Xiang(项元江)1,2,†
- 1 Research Institute of Hunan University in Chongqing, Chongqing 401120, China;
2 School of Physics and Electronics, Hunan University, Changsha 410082, China
Topological slow light and rainbow trapping of surface wave in valley photonic crystal bounded by air
Shuheng Chen(陈书恒)1,2, Yi Qi(齐奕)1,2, Yucen Li(李昱岑)1,2, Qihao Wang(王琪皓)1,2, and Yuanjiang Xiang(项元江)1,2,†
- 1 Research Institute of Hunan University in Chongqing, Chongqing 401120, China;
2 School of Physics and Electronics, Hunan University, Changsha 410082, China
摘要： Topological slow light and rainbow trapping tend to rely on large-scale interface structure in previous research work, which have restricted further miniaturization. In this work, we propose a method to realize slow light and rainbow trapping at the zigzag edge of a single valley photonic crystals (VPCs) bounded by air, which is very different from previous studies where rainbow trapping is supported at the interface separating two VPCs with inversion symmetry. By constructing the VPC-air boundaries and VPC-VPC interfaces experimentally, we have observed the topologically protected rainbow trapping simultaneously at the external and internal boundary. This work provides a feasible platform for the miniaturized optical communication devices such as optical buffers, optical storage and optical routing.
中图分类号: (Optical trapping)
- 87.80.Cc