The photonic spin Hall effect (PSHE) plays an important role in both fundamental science
and precision metrology. In this paper, we theoretically propose a polarization-dependent …

We achieve reflection-type bound states in the continuum (BICs) in the compound grating
waveguide structure by tuning the excitation of the guided modes. Assisted by the quasi …

Based on the selective excitations of the forward and backward propagating resonant
guided modes, we achieve dual bound states in the continuum (dual BICs) in a compound …

Bound states in the continuum (BIC) have garnered considerable attention recently for their
unique capacity to confine electromagnetic waves within an open or non-Hermitian system …

Recently, based on the selective excitation of the guided mode, researchers realized quasi-
bound states in the continuum (quasi-BICs) in all-dielectric compound grating waveguide …

The miniaturization of nonlinear light sources is central to the integrated photonic platform,
driving a quest for high-efficiency frequency generation and mixing at the nanoscale. In this …

In this paper, we elucidate the formation of bound states in the continuum (BICs) in
compound grating waveguide structures from the perspective of momentum mismatch. As …

Slow light effect plays a crucial role in both optical physics and devices. Herein, we explore
the possibility to achieve ultraslow light effect based on the quasibound states in the …

Herein, we realize quasi-bound states in the continuum (quasi-BICs) in a compound grating
waveguide structure with a complex lattice. The first layer of the structure is a grating layer …

Either the bound states in the continuum (BIC) or quasi-BIC structure can be used as
Hermitian system when it has up-down symmetry (Cartesian coordinates in the out-plane or …