@inproceedings{262c240b68a74eb6830e9e4a7759e062,
title = "Spin-controlled vertical cavity surface-emitting lasers",
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.",
keywords = "Injection, LED, Polarization, Spin, VCSEL",
author = "Stephan H{\"o}vel and Gerhardt, {Nils C.} and Carsten Brenner and Hofmann, {Martin R.} and Lo, {Fang Yuh} and Dirk Reuter and Wieck, {Andreas D.} and Ellen Schuster and Werner Keune",
year = "2006",
doi = "10.1117/12.662411",
language = "English",
isbn = "0819462403",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Semiconductor Lasers and Laser Dynamics II",
note = "Semiconductor Lasers and Laser Dynamics II ; Conference date: 03-04-2006 Through 06-04-2006",
}