Fluorescence spectroscopy of the plasma induced by multifilament interaction in air

Plasma regions are created by a single probe filament, a plasma grating, and the probe filament interacting with the plasma grating. The continuum radiations and the linear radiations of the plasmas generated are used to investigate the dynamics of the three types of plasmas. As free electrons generated inside the plasma grating are accelerated by the probe laser field, the impact ionization rate of the molecules sharply increases, which results in particles inside the plasma dissociating through various reaction paths.