title: Optically erasing disorder in semiconductor microcavities with dynamic nuclear polarization.
abstract: The mean squared value of the photonic disorder is found to be reduced by a factor of 100 in a typical GaAs based microcavity when exposed to a circularly polarized continuous wave optical pump without any special spatial patterning. Resonant excitation of the cavity mode excites a spatially nonuniform distribution of spin-polarized electrons, which depends on the photonic disorder profile. Electrons transfer spin to nuclei via the hyperfine contact interaction, inducing a long-living Overhauser magnetic field able to modify the potential of exciton polaritons.
authors.affiliation: Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne EPFL, CH-1015 Lausanne, Switzerland.
authors.forename: T C H
authors.initials: TC
authors.lastname: Liew
authors.forename: V
authors.initials: V
authors.lastname: Savona