Controlled Polarization Switching in VCSELs by Means of Asymmetric Current Injection

L. M. Augustin, E. Smalbrugge, K. D. Choquette, F. Karouta, R. C. Strijbos, G. Verschaffelt, E. J. Geluk, T. G. Van de Roer, H. Thienpont

Research output: Contribution to journalArticlepeer-review


We have investigated the potential of asymmetric current injection for polarization switching in GaAs-based intracavity contacted vertical-cavity surface-emitting lasers using two sets of p- and n-type contacts per device. When using the contacts aligned along the [11̄0] crystal direction, the observed laser polarization is parallel to [110], whereas, using the contacts along the [110] crystal direction, the polarization of the laser emission switches to a direction making an angle of 25°-90° towards [110]. To overcome this peculiar result, a careful design of the contact layers in the intracavity structure is required.

Original languageEnglish (US)
Pages (from-to)708-710
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number3
StatePublished - Mar 2004


  • Asymmetric current injection
  • Distributed feedback lasers
  • GaAs
  • Intracavity contacts
  • Polarization control
  • Polarization switching
  • Semiconductor lasers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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