Coherence effects in light scattering of two-dimensional photonic disordered systems: Elastic scattering of cavity polaritons

Resonant scattering by cavity polaritons in a semiconductor microcavity is investigated. The bidimensional photonic behavior is well shown by the angular spread of the Rayleigh scattered light on the elastic cone. Moreover, the strong coupling between the excitonic oscillator and the cavity mode enables the simultaneous observation of both (i) universal properties of disordered systems such as coherent backscattering over a large angular width, and (ii) scattering anisotropy due to the microscopic nature of the scatterer.