Controlling polarization of quantum-dot surface-emitting lasers by using structurally anisotropic self-assembled quantum dots
- 4 August 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 71 (5), 590-592
- https://doi.org/10.1063/1.119802
Abstract
Polarization control is achieved in vertical-cavity surface-emitting lasers (VCSELs) by using structurally anisotropic self-assembled quantum dots (QDs) as active layers. The dot shape is long in the [01̄1] direction on the (100) surface. The photoluminescence from the dots has a polarization dependence whose intensity along the [01̄1] direction is 1.37 times stronger than that along the orthogonal [011] direction. The QD VCSEL operates at the wavelength of the QD ground state transition. Lasing emission shows polarization along the [01̄1] direction and an orthogonal polarization suppression ratio of 18 dB.Keywords
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