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Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers

Schulz-Ruhtenberg, M. and Babushkin, I. V. and Loiko, N. A. and Huang, K. F. and Ackemann, T. (2010) Polarization properties in the transition from below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers. Physical Review A, 81 (2). 023819. ISSN 1050-2947

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    Abstract

    For highly divergent emission of broad-area vertical-cavity surface-emitting lasers, a rotation of the polarization direction by up to 90 degrees occurs when the pump rate approaches the lasing threshold. Well below threshold the polarization is parallel to the direction of the transverse wave vector and is determined by the transmissive properties of the Bragg reflectors that form the cavity mirrors. In contrast, near-threshold and above-threshold emission is more affected by the reflective properties of the reflectors and is predominantly perpendicular to the direction of transverse wave vectors. Two qualitatively different types of polarization transition are demonstrated: an abrupt transition, where the light polarization vanishes at the point of the transition, and a smooth transition, where it is significantly nonzero during the transition.

    Item type: Article
    ID code: 28921
    Keywords: semiconductor-lasers, spontaneous emission, pattern-formation, fourier modes, competition, dynamics, anisotropies., aperture, section, Optics. Light, Atomic and Molecular Physics, and Optics
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
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    Depositing user: Pure Administrator
    Date Deposited: 07 Mar 2011 23:21
    Last modified: 27 Mar 2014 11:18
    URI: http://strathprints.strath.ac.uk/id/eprint/28921

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