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Polarization dynamics in vertical-cavity surface emitting lasers

Ackemann, Thorsten and Sondermann, M. (2005) Polarization dynamics in vertical-cavity surface emitting lasers. In: Trends in spatiotemporal dynamics in lasers. Research Signpost, Keralia, pp. 82-110. ISBN 81-7736-235-6

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    Abstract

    Experiments and their interpretation on polarization dynamics and polarization switching in vertical-cavity surface-emitting lasers operated in the fundamental transverse mode regime are reviewed. Important observations are switching events to a mode with the lower unsaturated gain and the existence of elliptically polarized dynamical transition states after the destabilization of the low-frequency polarization mode. The observations demonstrate the need to consider explicitly the phase properties of the optical field as well as nonlinear effects affecting polarization selection above threshold. Good qualitative agreement is found with a model which takes into account the spin degrees of freedom of the light field as well as of the carriers (`spin-flip model'), if the spin-flip rate is taken to be some tens of $10^9$~s$^{-1}$. This constitutes a strong -- though indirect -- indication that spin dependent processes are important in polarization selection in the devices investigated.

    Item type: Book Section
    ID code: 32188
    Keywords: vertical cavity surface emitting laser, polarization , Physics
    Subjects: Science > Physics
    Department: Faculty of Science > Physics
    Related URLs:
      Depositing user: Pure Administrator
      Date Deposited: 19 Jul 2011 11:09
      Last modified: 05 Oct 2012 16:43
      URI: http://strathprints.strath.ac.uk/id/eprint/32188

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