Enhanced coherent transition radiation from midinfrared-laser-driven microplasmas.

ABSTRACT: We present a particle-in-cell (PIC) analysis of terahertz (THz) radiation by ultrafast plasma currents driven by relativistic-intensity laser pulses. We show that, while the I₀ [Formula: see text] product of the laser intensity I₀ and the laser wavelength λ₀ plays the key role in the energy scaling of strong-field laser-plasma THz generation, the THz output energy, W_THz, does not follow the I₀ [Formula: see text] scaling. Its behavior as a function of I₀ and λ₀ is instead much more complex. Our two- and three-dimensional PIC analysis shows that, for moderate, subrelativistic and weakly relativistic fields, W_THz(I₀ [Formula: see text]) can be approximated as (I₀λ₀^2</

SUBMITTER: Glek PB 

PROVIDER: S-EPMC9090813 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature