Metasurfaces, the planar version of artificial structured media at sub-wavelength scale,
provide the ability to manipulate light wave in a naturally unavailable way. They offer an …

Non-radiative optical modes attracted enormous attention in optics due to strong light
confinement and giant Q-factor at its spectral position. The destructive interference of …

Terahertz absorbers are crucial to the cutting‐edge techniques in the next‐generation
wireless communications, imaging, sensing, and radar stealth, as they fundamentally …

High-Q resonances in metasurfaces, stemming from symmetry-protected bound states in the
continuum (BICs), have proven to be effective for achieving high-performance optical …

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 …

Dielectric chiral metasurface is a new type of planar and efficient chiral optical device that
shows strong circular dichroism or optical activity, which has important application potential …

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 …

The support of high-Q resonances in all-dielectric nanostructures are necessary for the
enhancement of light-matter interactions. By introducing some perturbations into periodic …

All-dielectric metasurfaces supporting resonant quasi-bound states in the continuum (qBIC)
offer an ideal platform for various applications relying on intense light–matter interaction in …

Here we demonstrate the efficient photon-pair generation via spontaneous parametric down
conversion from a semiconductor metasurface supporting dual quasibound states in the …