Impurity doping is a promising method to impart new properties to various materials. Due to
their unique optical, magnetic, and electrical properties, rare-earth ions have been …

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 …

Wavelength-scale lasers provide promising applications through low power consumption
requiring for optical cavities with increased quality factors. Cavity radiative losses can be …

I review the four mechanisms of bound states in the continuum (BICs) in the application of
microwave and acoustic cavities open to directional waveguides. The most simple are …

The vast development of nanofabrication has spurred recent progress for the manipulation
of light down to a region much smaller than the wavelength. Metallic plasmonic array …

By using density functional theory and ab initio quantum-transport simulation, we study the
Schottky barrier and the rectifying behavior of diodes consisting of the two-dimensional …

The quality factor (Q), describing the rate of energy loss from a resonator, is a defining
performance metric for nanophotonic devices. Suppressing cavity radiative losses enables …

We study active dielectric metasurfaces composed of two-dimensional arrays of split-
nanodisk resonators fabricated in InGaAsP membranes with embedded quantum wells …

Highly compact lasers with ultra-low threshold and single-mode continuous wave (CW)
operation have been a long sought-after component for photonic integrated circuits (PICs) …

Cross-relaxation among neighboring emitters normally causes self-quenching and limits the
brightness of luminescence. However, in nanomaterials, cross-relaxation could be well …