Evolution of Degenerate Pairs of Bound States in the Continuum With Broken Symmetry
Wenzheng Zhao,
Weimin Wang,
Zhao-xian Chen
et al.
Abstract:Bound states in the continuum (BICs) with exceptionally high quality factors (Q factors) have become focal points in photonic device research, finding applications in nonlinear enhancement, laser generation, sensing, and beyond. In this study, we systematically investigate the intricate relationship between the in-plane symmetry groups of photonic crystals and symmetryprotected BICs (SP-BICs) using a rigorous group theory approach. By modifying the spatial distribution of refractive indices to perturb the C2 a… Show more
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