Enhancement of terahertz emission during single-color filamentation by chirping laser pulse

Abstract

We experimentally demonstrate that terahertz emission yield from single-color filament plasma can be increased by more than 3 times by ordinary laser pulse chirping at constant energy. The enhancement is spectrally selective, for each terahertz frequency there is an optimal laser pulse duration providing maximal terahertz emission. This provides a prospective tool for tailoring both spectrum and energy of the terahertz emission from a single-color filament.