ABSTRACT
The imperfections of semiconductor microcavity structures result in a disordered photonic potential landscape, which plays an important role in polariton propagation and even more in the formation of 2D macroscopically occupied polariton states. The influence of photonic disorder was first discussed for the case of the optical parametric oscillator [72], where macroscopically occupied signal and idle states are formed due to direct scattering of the resonantly excited pump polaritons. It was shown that the photonic disorder strongly affects the real space distribution of the signal [73], which consists of spatially localized modes emitting at different energies [74]. The nonequilibrium polariton BEC in CdTe microcavities excited non-resonantly was also observed to consist of several localized maxima [21], which arise from polariton trapping by the disorder potential.
