Polarization characteristics of 850-nm vertical-cavity surface-emitting lasers with intracavity contacts and a rhomboidal oxide current aperture

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• 作者：M. A. Bobrov ; N. A. Maleev ; S. A. Blokhin ; A. G. Kuzmenkov…
• 刊名：Semiconductors
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：50
• 期：10
• 页码：1390-1395
• 全文大小：563 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Magnetism and Magnetic Materials
  Electromagnetism, Optics and Lasers
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6479
• 卷排序：50

文摘

The polarization characteristics of 850-nm vertical-cavity surface-emitting lasers (VCSELs) with intracavity contacts and a rhomboidal oxide current aperture are studied. It is found that radiation polarization is always directed along the minor diagonal of the rhomboidal aperture (along the [\(\overline 1 \) 10] direction) for all single-mode VCSELs. The numerical simulation of carrier transport does not reveal the significant anisotropy of carrier injection to the active region. Furthermore, an analysis of the spatial distribution of the fundamental mode for two orthogonal polarizations within an effective waveguide model shows close transverse optical-confinement factors. Optical loss anisotropy in the asymmetric microcavity and/or gain anisotropy in the strained active region are the most likely mechanisms responsible for fixing the polarization.