Stimulated Brillouin scattering of electromagnetic waves in a dusty plasma

The stimulated scattering of electromagnetic waves off low-frequency modes in a homogeneous, unmagnetized, and collisionless dusty plasma has been investigated theoretically. The presence of the dust particles introduces a background inhomogeneous electric field that significantly influences the dispersive properties of the plasma. The usual Brillouin scattering at the ion-acoustic branch is found to be slightly modified by the charged dust grains. However, significant scattering is also found to occur at a frequency lower than the ion-acoustic frequency, off a new mode of the plasma arising from the oscillations of the ions in the static structure of the dust distribution.