When im**ing on optical structures or passing in their vicinity, free electrons can
spontaneously emit electromagnetic radiation, a phenomenon generally known as …

Moiré superlattices—twisted van der Waals (vdW) structures with small angles—are
attracting increasing attention in condensed matter physics, due to important phenomena …

For over 80 years of research, the conventional description of free-electron radiation
phenomena, such as Cherenkov radiation, has remained unchanged: classical three …

Surface plasmonics with its unique confinement of light, is expected to be a cornerstone for
future compact radiation sources and integrated photonics devices. The energy transfer …

Nanostructured-based broadband perfect absorbers are of great interest in a wide range of
applications, including spectroscopy, energy harvesting, and thermal photonics, etc. Here, a …

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 …

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 …

Cherenkov detectors enable a valuable tool to identify high-energy particles. However, their
sensitivity and momentum coverage are limited by the refractive index of host materials …

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

Polarization, as a fundamental property of light, plays a key role in many phenomena of near‐
field coupling, namely the coupling of source's evanescent waves into some guided modes …