Bound states in the continuum (BICs) have attracted attention in photonics owing to their
interesting properties. For example, BICs can effectively confine light in a counterintuitive …

Recent research in topological photonics has not only proposed and realized novel
topological phenomena such as one‐way broadband propagation and robust transport of …

Non-radiative bound states in the continuum (BICs) allow construction of resonant cavities
with confined electromagnetic energy and high-quality (Q) factors. However, the sharp …

The development of classical and quantum information–processing technology calls for on-
chip integrated sources of structured light. Although integrated vortex microlasers have been …

Sharp electromagnetic resonances play an essential role in physics in general and optics in
particular. The last decades have witnessed the successful developments of high-quality (Q) …

Wireless power transfer—the transmission of electromagnetic energy without physical
connectors such as wires or waveguides—typically exploits electromagnetic field control …

The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

Because of their ability to confine light, optical resonators,–are of great importance to
science and technology, but their performance is often limited by out-of-plane-scattering …

Bound states in the continuum (BICs) can confine light with a theoretically infinite Q factor.
However, in practical on-chip resonators, scattering loss caused by inevitable fabrication …

Optical vortices, beams with spiral wavefronts and screw phase dislocations, have been
attracting increasing interest in various fields. Here, we theoretically propose and …