Xiao-Qing Luo

Centroid-Symmetry-Controlled High-Q Terahertz Quasi-BIC Resonances in an All-Dielectric Tetramer Metasurface

Terahertz (THz) metasurfaces provide compact platforms for narrowband spectral readout and sensing, but useful operation requires high modal Q, far-field accessibility, and angular robustness. Here we numerically investigate a Si tetramer metasurface on a SiO2 substrate. In the lossless model, balanced radiation centro...