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

doi:10.1117/12.662411

14 April 2006 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

Author Affiliations +

Proceedings Volume 6184, Semiconductor Lasers and Laser Dynamics II; 61840Y (2006) https://doi.org/10.1117/12.662411
Event: SPIE Photonics Europe, 2006, Strasbourg, France

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.

Citation Download Citation

Stephan Hövel, Nils C. Gerhardt, Carsten Brenner, Martin R. Hofmann, Fang-Yuh Lo, Dirk Reuter, Andreas D. Wieck, Ellen Schuster, and Werner Keune "Spin-controlled vertical cavity surface-emitting lasers", Proc. SPIE 6184, Semiconductor Lasers and Laser Dynamics II, 61840Y (14 April 2006); https://doi.org/10.1117/12.662411

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