Bound states in the continuum in asymmetric one-dimensional photonic crystal systems guided by anisotropy

• DOI: 10.1364/oe.482894
• Publication Date: 2023-01-25T10:00:09Z
• Authors: Ziyi Liu; Xiangning Li; Chen Chen; Xu Wang; Wenya Gao; Weimin Ye; Li Li; Jianlong Liu
• Keywords: 0103 physical sciences; 01 natural sciences

Bound states in the continuum (BICs) have been widely observed many symmetric geometries optical system during last decade. Here, we consider a scenario which structure is designed asymmetrically with anisotropic birefringent material embedded one-dimensional photonic crystals. This kind of new shape opens possibility obtaining symmetry-protected BICs (SP-BICs) and Friedrich–Wintgen (FW-BICs) form tunable anisotropy axis tilt. Interestingly, these can be as high-Q resonances by variation system’s parameters, such incident angle, means without being injected at Brewster's angle also achieve BICs. Our findings might active regulation are easy to manufacture.