Degenerate microwave mixing in an impurity-containing plasma

Abstract

The degenerate microwave (including both two- and four-wave) mixing in a dusty plasma is studied on a slow time scale which involves heavy impurity particle response to the electromagnetic waves. It is shown that the density grating and the corresponding third-order nonlinear susceptibility are independent of the wavelength of the grating, and decrease almost linearly with the concentration of the dust particle. The two-wave mixing process does not contribute to the phase-conjugate reflectivity, it introduces only an additional wavenumber shift to the electromagnetic waves.