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We investigate the effects of a movable mirror (cantilever) of an opticalcavity on the superradiant light scattering from a Bose-Einstein condensate(BEC) in an optical lattice. We show that the mirror motion has a dynamicdispersive effect on the cavity-pump detuning. Varying the intensity of thepump beam, one can switch between the pure superradiant regime and the Braggscattering regime. The mechanical frequency of the mirror strongly influencesthe time interval between two Bragg peaks. We found that when the system is inthe resolved side band regime for mirror cooling, the superradiant scatteringis enhanced due to coherent energy transfer from the mechanical mirror mode tothe cavity field mode.

Opto-mechanical effects in superradiant light scattering by Bose-Einstein condensate in a cavity