Quasi–one-dimensional flow of polariton condensate past an obstacle
Institute of Spectroscopy, Russian Academy of Sciences - Troitsk, Moscow Region, 142190, Russia
Accepted: 22 November 2011
Nonlinear wave patterns generated by the flow of polariton condensate past an obstacle are studied for quasi–one-dimensional microcavity geometry. It is shown that pumping and nonlinear damping play a crucial role in this process leading to sharp differences in subsonic and supersonic regimes. Subsonic flows result in a smooth disturbance of the equilibrium condensate around the obstacle whereas supersonic flow generates a dispersive shock wave in the flow upstream the obstacle and a long smooth downstream tail. Main characteristics of the wave pattern are calculated analytically and analytical results are in excellent agreement with the results of numerical simulations. The conditions for existence of stationary wave patterns are determined numerically.
PACS: 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow / 71.36.+c – Polaritons (including photon-phonon and photon-magnon interactions) / 42.65.Sf – Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics
© EPLA, 2012