This work identifies a twist-enabled coupling mechanism in twisted bilayer photonic crystals (TBPCs) that connects bound states in the continuum (BIC) modes to free space. This mechanism enables the generation of optical vortices with both odd and even topological orders. The robustness of vortex generation against geometric disturbances makes TBPCs a promising platform for controlled vortex generation, with potential applications in integrated optical information processing and optical tweezers.
Publisher
Nature Communications
Published On
Sep 27, 2023
Authors
Tiancheng Zhang, Kaichen Dong, Jiachen Li, Fanhao Meng, Jingang Li, Sai Munagavalasa, Costas P. Grigoropoulos, Junqiao Wu, Jie Yao
Tags
twisted bilayer photonic crystals
optical vortices
bound states in the continuum
vortex generation
geometric disturbances
optical information processing
optical tweezers
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