Ultrafast circular polarization oscillations in spin-polarized vertical-cavity surface-emitting laser devices

N. C. Gerhardt, M. Li, H. Jaehme, H. Soldat, M. R. Hofmann, T. Ackemann

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

5 Citations (Scopus)
235 Downloads (Pure)


Spin-polarized lasers offer new encouraging possibilities for future devices. We investigate the polarization dynamics of electrically pumped vertical-cavity surface-emitting lasers after additional spin injection at room temperature. We find that the circular polarization degree exhibits faster dynamics than the emitted light. Moreover the experimental results demonstrate a strongly damped ultrafast circular polarization oscillation due to spin injection with an oscillation frequency of approximately 11GHz depending on the birefringence in the VCSEL device. We compare our experimental results with theoretical calculations based on rate-equations. This allows us to predict undamped long persisting ultrafast polarization oscillations, which reveal the potential of spin-VCSELs for ultrafast modulation applications.
Original languageEnglish
Title of host publicationPhysics and Simulation of Optoelectronic Devices XVIII
EditorsB Witzigmann, F Henneberger, Y Arakawa, M Osinski
Number of pages10
Publication statusPublished - 25 Feb 2010
EventConference on Physics and Simulation of Optoelectronic Devices XVIII - San Francisco, United States
Duration: 25 Jan 201028 Jan 2010

Publication series

NameProc. SPIE


ConferenceConference on Physics and Simulation of Optoelectronic Devices XVIII
CountryUnited States
CitySan Francisco


  • circular polarization oscillations
  • vertical cavity
  • spin-polarized

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