Share Email Print
cover

Proceedings Paper

Ultrafast circular polarization oscillations in spin-polarized vertical-cavity surface-emitting laser devices
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Spin-polarized lasers offer new encouraging possibilities for future devices. We investigate the polarization dynamics of electrically pumped vertical-cavity surface-emitting lasers after additional spin injection at room temperature. We find that the circular polarization degree exhibits faster dynamics than the emitted light. Moreover the experimental results demonstrate a strongly damped ultrafast circular polarization oscillation due to spin injection with an oscillation frequency of approximately 11GHz depending on the birefringence in the VCSEL device. We compare our experimental results with theoretical calculations based on rate-equations. This allows us to predict undamped long persisting ultrafast polarization oscillations, which reveal the potential of spin-VCSELs for ultrafast modulation applications.

Paper Details

Date Published: 26 February 2010
PDF: 9 pages
Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 75970Q (26 February 2010); doi: 10.1117/12.841606
Show Author Affiliations
N. C. Gerhardt, Ruhr-Univ. Bochum (Germany)
M. Li, Ruhr-Univ. Bochum (Germany)
H. Jaehme, Ruhr-Univ. Bochum (Germany)
H. Soldat, Ruhr-Univ. Bochum (Germany)
M. R. Hofmann, Ruhr-Univ. Bochum (Germany)
T. Ackemann, Univ. of Strathclyde (United Kingdom)


Published in SPIE Proceedings Vol. 7597:
Physics and Simulation of Optoelectronic Devices XVIII
Bernd Witzigmann; Fritz Henneberger; Yasuhiko Arakawa; Marek Osinski, Editor(s)

© SPIE. Terms of Use
Back to Top