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 …

Two-dimensional (2D) materials including graphene, transition metal dichalcogenides, black
phosphorus, MXenes, and semimetals have attracted extensive and widespread interest …

We reveal a mechanism to enhance particle-matter interactions by exploiting the pseudo-
Brewster effect of gain materials, presenting an enhancement of at least four orders of …

Cat states and Gottesman-Kitaev-Preskill (GKP) states play a key role in quantum
computation and communication with continuous variables. The creation of such states …

The emission of light from charged particles underlies a wealth of scientific phenomena and
technological applications. Classical theory determines the emitted photon energy by …

Cherenkov radiation occurs only when a charged particle moves with a velocity exceeding
the phase velocity of light in that matter. This radiation mechanism creates directional light …

When a charged particle penetrates through an optical interface, photon emissions emerge—
a phenomenon known as transition radiation. Being paramount to fundamental physics …

A central challenge in the emerging field of free-electron quantum optics is to achieve strong
quantum interaction and single-photon nonlinearity between a flying free electron and a …

Cavity QED, wherein a quantum emitter is coupled to electromagnetic cavity modes, is a
powerful platform for implementing quantum sensors, memories, and networks. However …

Cathodoluminescence (CL) nanoscopy is proven to be a powerful tool to explore nanoscale
optical properties, whereby free electron beams achieve a spatial resolution far beyond the …