W. Yu et al., HARMONIC-GENERATION BY RELATIVISTIC ELECTRONS DURING IRRADIANCE OF A SOLID TARGET BY A SHORT-PULSE ULTRAINTENSE LASER, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(3), 1998, pp. 2531-2534
A simple surface current model is proposed for studying harmonic gener
ation by a short-pulse high-intensity circularly polarized laser irrad
iating a solid target normally. Exact relativistic electron dynamics i
s taken into account. It is found that high harmonics peaked at direct
ions normal to that of incidence are efficiently generated.