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 …

Investigating the interaction of electron beams with materials and light has been a field of
research for more than a century. The field was advanced theoretically by the rise of …

We present the observation and the detailed investigation of coherent Cherenkov diffraction
radiation (CChDR) in terms of spectral-angular characteristics. Electromagnetic simulations …

Nonlinear harmonic radiation was observed using the VISA self-amplified, spontaneous
emission (SASE) free-electron laser (FEL) at saturation. The gain lengths, spectra, and …

Recently, there has been an increasing interest in energetic hot electrons generated in
ultraintense laser plasma interactions because of their many potential applications in …

We report observations of coherent optical transition radiation interferometry (COTRI)
patterns generated by microbunched∼ 200-MeV electrons as they emerge from a laser …

Hot electrons and optical emission are measured from the rear surface of a metallic foil. The
spectra of the optical emission in the near infrared region have a sharp spike around the …

We report the first measurements of z-dependent coherent optical transition radiation
(COTR) due to electron-beam microbunching at high gains (> 10 4) including saturation of a …

In this paper, we discuss the velocity compression in a short rf linac of an electron bunch
from a rf photoinjector operated in the blowout regime. Particle tracking simulations shows …