Ionization-induced conversion of ultrashort Bessel beam to terahertz pulse.
We examine the conical terahertz emission from the superluminous ionization front created in air by an axicon-focused femtosecond laser pulse. We develop the theoretical model that explains the experimental results and predicts new possibilities to control terahertz pulse parameters.
Kostin
V A
VA
Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia.
Vvedenskii
N V
NV