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Gigahertz circular polarization oscillations in spin-polarized vertical-cavity surface-emitting lasers

Gerhardt, N. C. and Li, M. and Jaehme, H. and Soldat, H. and Hofmann, M. R. and Ackemann, T. (2010) Gigahertz circular polarization oscillations in spin-polarized vertical-cavity surface-emitting lasers. In: Conference on Lasers and Electro-Optics CLEO/Quantum Electronics and Laser Science Conference (QELS), 2010-05-16 - 2010-05-21.

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Abstract

We analyze ultrafast circular polarization oscillations in a commercial vertical-cavity surface-emitting laser after spin injection at room temperature. The circular polarization exhibits faster dynamics than the intensity and longer persistence than the spin relaxation time.