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

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

Quantum information, communication, and sensing rely on the generation and control of
quantum correlations in complementary degrees of freedom. Free electrons coupled to …

Flatbands have become a cornerstone of contemporary condensed-matter physics and
photonics. In electronics, flatbands entail comparable energy bandwidth and Coulomb …

Bombardment of materials by high-energy particles often leads to light emission in a process
known as scintillation. Scintillation has widespread applications in medical imaging, x-ray …

Manipulating the properties of the isofrequency contours (IFCs) of materials provides a
powerful means of controlling the interaction between light and matter. Hyperbolic …

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 …

Photonic time-crystals (PTCs) are spatially homogeneous media whose electromagnetic
susceptibility varies periodically in time, causing temporal reflections and refractions for any …

Cherenkov radiation (CR) excited by fast charges can serve as on-chip light sources with a
nanoscale footprint and broad frequency range. The reversed CR, which usually occurs in …

Free-electron radiation such as Cerenkov, Smith–Purcell and transition radiation, can be
greatly affected by structured optical environments, as has been demonstrated in a variety of …