High frequency continuous birefringence-induced oscillations in spin-polarized vertical-cavity surface-emitting lasers

M. S. Torre, H. Susanto, Nianqiang Li, K. Schires, M. F. Salvide, I. D. Henning, M. J. Adams, A. Hurtado

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Abstract

Sustained, large amplitude and tuneable birefringenceinduced oscillations are obtained in a spin-Vertical Cavity Surface Emitting Laser (spin-VCSEL). Experimental evidence is provided using a spin-VCSEL operating at 1300 nm, under continuous wave optical pumping and at room temperature. Numerical and stability analyses are performed to interpret the experiments and to identify the combined effects of pump ellipticity, spin relaxation rate and cavity birefringence. Importantly, the frequency of the induced oscillations is determined by the device’s birefringence rate which can be tuned to very large values. This opens the path for ultrafast spin-lasers operating at record frequencies exceeding those possible in traditional semiconductor lasers and with ample expected impact in disparate disciplines (e.g. datacomms, spectroscopy).
Original languageEnglish
Article number284816
Number of pages5
JournalOptics Letters
Volume42
Issue number8
Early online date23 Mar 2017
Publication statusE-pub ahead of print - 23 Mar 2017

Keywords

  • birefringence
  • oscillations
  • spin-vertical cavity surface emitting laser
  • pump ellipticity
  • spin relaxation
  • cavity birefringence
  • ultrafast spin lasers

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