Spin-controlled vertical cavity surface-emitting lasers

Stephan Hövel, Nils C. Gerhardt, Carsten Brenner, Martin R. Hofmann, Fang-Yuh Lo, Dirk Reuter, Andreas D. Wieck, Ellen Schuster, Werner Keune

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

1 Citation (Scopus)

Abstract

The output polarization of an optically pumped InGaAs/GaAs vertical cavity surface-emitting laser (VCSEL) is analyzed at room temperature as a function of the circular input polarization degree. The emission of the VCSEL is unambiguously controlled by the exciting polarization and only 30% of spin-polarized electrons are needed in the active region to generate an output polarization degree of up to 100% at short-pulsed pumping. This testifies that a VCSEL can be used as an effective amplifier for spin information even at room temperature. Measurements with a continuous wave excitation were executed to demonstrate the possibility of spin-amplification by electrical spin-injection in a VCSEL. All measurements were confirmed by a phenomenological spin flip model. Our paper is completed with the introduction of Fe/Tb-Multilayers used for spin injection. These contacts enable spin injection without external magnetic fields, i.e. in remanence. Finally, we suggest a combination of these multilayers with a VCSEL-structure to create the first spin-optoelectronic device working both at room temperature and without external fields.

Original languageEnglish
Title of host publicationSemiconductor Lasers and Laser Dynamics II
DOIs
Publication statusPublished - 2006 Aug 9
EventSemiconductor Lasers and Laser Dynamics II - Strasbourg, France
Duration: 2006 Apr 32006 Apr 6

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6184
ISSN (Print)0277-786X

Other

OtherSemiconductor Lasers and Laser Dynamics II
CountryFrance
CityStrasbourg
Period06/4/306/4/6

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Keywords

  • Injection
  • LED
  • Polarization
  • Spin
  • VCSEL

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Hövel, S., Gerhardt, N. C., Brenner, C., Hofmann, M. R., Lo, F-Y., Reuter, D., Wieck, A. D., Schuster, E., & Keune, W. (2006). Spin-controlled vertical cavity surface-emitting lasers. In Semiconductor Lasers and Laser Dynamics II [61840Y] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6184). https://doi.org/10.1117/12.662411