Under- and superluminal parametric Doppler and Bragg effects in nonlinear dielectrics
Vavilov State Optical Institute , Russia
Considered is propagation of probe radiation through a medium with cubic optical nonlinearity perturbed by cw- or pulsed strong pump radiation with orthogonal polarization (1D-geometry). With respect to the probe radiation, the pump radiation induces in the medium inhomogeneities propagating with under- or superluminal velocity. It is shown that in the case of superluminal propagation, reflected probe radiation has conjugated phase and Doppler-shifted frequency.