Discretized disorder in planar semiconductor microcavities: Mosaicity effect on resonant Rayleigh scattering and optical parametric oscillation
Résumé
The features of resonant secondary emission by two-dimensional multiple semiconductor microcavities are experimentally investigated. We show that, under normal laser incidence, static disorder determines the final states of the resonant Rayleigh scattering in the high symmetry axes of the GaAs matrix. Scanning transmission electron microscopy reveals a small dislocation density at the layers interfaces and step formation due to strain accumulation and relaxation ruled by the symmetry of the underlying GaAs matrix: this mosaicity effects, a common feature in thick and strained crystals, determines the scattering channels by selecting the crystallographic discretized directions. Moreover, interband optical parametric oscillation of intensity balanced signal and idler beams takes place in the directions selected by the photonic disorder in the distributed Bragg reflector.
Domaines
Autre [cond-mat.other]| Origine | Fichiers produits par l'(les) auteur(s) |
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