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

Plasmonic excitations, consisting of collective oscillations of the electron gas in a conductive
film or nanostructure coupled to electromagnetic fields, play a prominent role in photonics …

We present an extensive study of resonant two-dimensional (2D) plasmon excitations in
grating-gated quantum well heterostructures, which enable an electrical control of periodic …

Electrons interacting with plasmonic structures can give rise to resonant excitations in
localized plasmonic cavities and to collective excitations in periodic structures. We …

A moving charged particle, such as an electron, can radiate light due to the interaction
between its Coulomb field and surrounding matter. This phenomenon has spawned great …

Terahertz (THz) radiation has broad applications ranging from medical imaging to
spectroscopy. One viable source of high‐intensity THz radiation is the Smith–Purcell (SP) …

Graphene is a promising materials system for basic studies and device applications in THz
optoelectronics with several key functionalities, including photodetection and optical …

We construct the first-principles theory for the scattering of the Coulomb field of a fast
electron traveling along an array of nano-or microparticles. The electron's trajectory is …

The Smith-Purcell effect is a hallmark of light-matter interactions in periodic structures,
resulting in light emission with distinct spectral and angular distribution. We find yet …

We report the results of experimental and theoretical studies of monochromatic coherent
terahertz radiation generated by a short relativistic electron bunch interacting with a …