Abstract
Intra-cavity contacted In/sub 0.17/Ga/sub 0.83/As/AlAs VCSELs with asymmetrical and symmetric contacts were fabricated and characterized. The square devices with asymmetric current injection emit light polarized perpendicular to the direction of the current injection, despite the fact that these VCSELs have higher order transverse modes. The asymmetric current injection scheme seems thus to be able to stabilize the polarization. We expect that smaller devices working in single mode operation will further enhance the polarization contrast.
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