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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CB1_3

Birefringence and spin controlled ultrafast polarization oscillations in vertical-cavity surface-emitting lasers

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Abstract

Optical selection rules for the interaction between light and matter lead to a direct connection between the spin of the carriers, e.g. in GaAs, and the polarization of the emitted or absorbed light. This enables spin-controlled pho-tonic devices for the generation, transport and processing of spin information. For applications, room-temperature, electrically pumped devices are sought after. The spin-controlled vertical-cavity surface-emitting laser (spin-VCSEL) is a much more promising concept for applications than the spin-LED, since cavity feedback effects can amplify the relatively small spin polarization usually achievable under electrical injection at room temperature. In this contribution we present results on the transient spin and polarization dynamics of commercial VCSELs combining electrical with optical pumping, the latter representing a small spin-polarized electrical injection anticipated for future spin-VCSELs.

© 2011 Optical Society of America

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