DEGENERATE MICROWAVE MIXING IN AN IMPURITY-CONTAINING PLASMA

The degenerate microwave (including both two- and four-wave) mixing in a dusty plasma is studied on a slow time scale which involves heavy i mpurity particle response to the electromagnetic waves. It is shown th at the density grating and the corresponding third-order nonlinear sus ceptibility are independent of the wavelength of the grating, and decr ease almost linearly with the concentration of the dust particle. The two-wave mixing process does not contribute to the phase-conjugate ref lectivity, it introduces only an additional wavenumber shift to the el ectromagnetic waves.