Parametric excitations of fast plasma waves by counterpropagating laser beams.
Short- and long-wavelength plasma waves can become strongly coupled in the presence of two counterpropagating laser pump pulses detuned by twice the cold-plasma frequency omega(p). What makes this four-wave interaction important is that the growth rate of the plasma waves occurs much faster than in the more obvious copropagating geometry.
Shvets
G
G
Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543, USA.
Fisch
N J
NJ