Nanophotonic devices, such as metasurfaces and silicon photonic components, have been
progressively demonstrated to be efficient and versatile alternatives to their bulky …

Transition radiation is a fundamental process of light emission and occurs whenever a
charged particle moves across an inhomogeneous region. One feature of transition radiation …

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 …

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

Metasurfaces constitute a powerful approach to generate and control light by engineering
optical material properties at the subwavelength scale. Recently, this concept was applied to …

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

As one of leading technologies in detecting relativistic particles, Cherenkov radiation plays
an essential role in modern high‐energy and particle physics. However, the limited photon …

The exponentially decaying nature of evanescent waves renders it difficult to capture, extract
and engineer the wealth of energy and information that they can carry. Utilizing the out‐of …

Recent advances in vortex Smith–Purcell radiation (V‐SPR) have spurred many
breakthroughs in the generation of vortex beams for their potential applications in chiral …

Free-electron radiation results from the interaction between swift electrons and the local
electromagnetic environment. Recent advances in material technologies provide powerful …