Wide-angle high-Q resonances
By aligning multiple topological polarization charges with all diffraction channels, high-Q resonances are achieved across the entire moiré flat band, with robustness against structural disorder, offering a new route for optical devices with wide-angle responses.
Zhang, Xiangdong · Zhang, Huizhen · Pan, Ruhao · Li, Junjie · Shi, Lei · Zi, Jian · Zhang, Weixuan
Nature Communications 2024
High-Q resonances achieved across the entire moiré flat band
Q-factors decay slowly away from moiré BICs in momentum space
Q-factors of the moiré flat band remain high under structural disorder