Loop parametric scattering of cavity polaritons

Within the framework of mean-field approximation, a coherently excited two-dimensional system weakly repulsive bosons is predicted to show giant loop scattering when rotational symmetry reduced. The considered process combines (i) parametric decay driven condensate into different k-states and (ii) their massive back owing spontaneous synchronization several four-wave mixing channels. hybridization direct inverse processes, which are thus do not balance each other, makes oscillate under constant one-mode excitation. In particular, amplitude polariton by resonant electromagnetic wave in uniform polygonal GaAs-based microcavity expected sub-THz frequency domain.