Controlled Polarization Switching in VCSELs by Means of Asymmetric Current Injection

L. M. Augustin, E. Smalbrugge, Kent 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 1 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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