Share Email Print

Proceedings Paper

Spin-controlled vertical cavity surface-emitting lasers
Author(s): Stephan Hövel; Nils C. Gerhardt; Carsten Brenner; Martin R. Hofmann; Fang-Yuh Lo; Dirk Reuter; Andreas D. Wieck; Ellen Schuster; Werner Keune
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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.

Paper Details

Date Published: 14 April 2006
PDF: 14 pages
Proc. SPIE 6184, Semiconductor Lasers and Laser Dynamics II, 61840Y (14 April 2006); doi: 10.1117/12.662411
Show Author Affiliations
Stephan Hövel, Ruhr-Univ. Bochum (Germany)
Nils C. Gerhardt, Ruhr-Univ. Bochum (Germany)
Carsten Brenner, Ruhr-Univ. Bochum (Germany)
Martin R. Hofmann, Ruhr-Univ. Bochum (Germany)
Fang-Yuh Lo, Ruhr-Univ. Bochum (Germany)
Dirk Reuter, Ruhr-Univ. Bochum (Germany)
Andreas D. Wieck, Ruhr-Univ. Bochum (Germany)
Ellen Schuster, Duisburg-Essen Univ. (Germany)
Werner Keune, Duisburg-Essen Univ. (Germany)

Published in SPIE Proceedings Vol. 6184:
Semiconductor Lasers and Laser Dynamics II
Daan Lenstra; Markus Pessa; Ian H. White, Editor(s)

© SPIE. Terms of Use
Back to Top