摘要
Topological edge states have an important role in optical modulation with potential applications in wavelength division multiplexers(WDMs).In this paper,2D photonic crystals(PCs)with different rotation angles are combined to generate topological edge states.We reveal the relationship between the edge states and the rotation parameters of PCs,and further propose a WDM to realize the application of adjustable beams.Our findings successfully reveal the channel selectivity for optical transmission and provide a flexible way to promote the development of topological photonic devices.
基金
National Key Research and Development Program of China(2022YFE0122300)
National Natural Science Foundation of China(11811530052,12004425,1211101294,62105126)
State Key Laboratory of Millimeter Waves(K202105,K202238)
Intergovernmental Science and Technology Regular Meeting Exchange Project of Ministry of Science and Technology of China(CB02-20)
Natural Science Foundation of Jiangsu Province(BK20200630)。
