Lasing Polarization Characteristics in 1.55-μm Spin-Injected VCSELs

Nobuhide Yokota, Ryutaro Takeuchi, Hiroshi Yasaka, Kazuhiro Ikeda

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Circular polarization characteristics in vertical-cavity surface-emitting lasers (VCSELs) with InAlGaAs quantum wells injected by spin-polarized electrons were investigated. A degree of circular polarization of 10% was obtained in a reduced birefringence VCSEL at a lasing wavelength of 1544 nm at room temperature under optical pumping of spin-polarized electrons. Strong birefringence originally introduced to stabilize the lasing polarization was confirmed to be undesirable for a high degree of circular polarization in spin-injected VCSELs. A spin-flip rate equation analysis fairly reproduced the experimental results and supported our conclusions.

Original languageEnglish
Article number7875470
Pages (from-to)711-714
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number9
Publication statusPublished - 2017 May 1


  • InAlGaAs quantum well
  • Vertical cavity surface emitting laser
  • birefringence
  • electron spin

ASJC Scopus subject areas

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


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