Koustuban Ravi

TL;DR: Terahertz-driven accelerating structures enable high-gradient electron/proton accelerators with simple accelerating structures, high repetition rates and significant charge per bunch that hold great potential to have a transformative impact for free electron lasers, linear colliders, ultrafast electron diffraction, X-ray science and medical therapy with X-rays and electron beams.

TL;DR: The AXSIS project at CFEL in Hamburg develops a compact, fully coherent, THz-driven atto-second X-ray source based on coherent inverse Compton scattering off a free-electron crystal, to outrun radiation damage effects due to the necessary highX-ray irradiance required to acquire diffraction signals.

TL;DR: In this paper, a 1-dimensional (1-D) model was proposed to simultaneously account for the nonlinear coupled interaction of the THz and optical radiation, angular and material dispersion, absorption, self-phase modulation and stimulated Raman scattering.

TL;DR: It is numerically shown that the large experimentally observed cascaded frequency down-shift and spectral broadening (cascading effects) of the optical pump pulse is a direct consequence of THz generation, and the exclusion of these cascading effects in modeling OR, leads to a significant overestimation of the Optical-to-THz conversion efficiency.

TL;DR: In this article, an all-optical single-cycle terahertz (THz) gun was demonstrated to achieve peak electron energy approaching 1 keV, accelerated by >300 MV/m THz fields in a micrometer-scale waveguide structure.