Controlled switching of ultrafast circular polarization oscillations in spin-polarized vertical-cavity surface-emitting lasers

We demonstrate a scheme for controlled switching of polarization oscillations in spin-polarized vertical-cavity surface-emitting lasers (spin-VCSEL). Under hybrid electrical and optical pumping conditions, our VCSEL devices show polarization oscillations with frequencies far above the VCSEL's e...

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Bibliographic Details
Published in:Applied physics letters 2014-01, Vol.104 (2)
Main Authors: Höpfner, Henning, Lindemann, Markus, Gerhardt, Nils C., Hofmann, Martin R.
Format: Article
Language:English
Subjects:
Applied physics
Circular polarization
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
LASERS
Optical pulses
OPTICAL PUMPING
OSCILLATIONS
POLARIZATION
Polarization (spin alignment)
SPIN
SPIN ORIENTATION
SWITCHES
Switching
Vertical cavity surface emission lasers
Vertical oscillations
Vertical polarization
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Summary:We demonstrate a scheme for controlled switching of polarization oscillations in spin-polarized vertical-cavity surface-emitting lasers (spin-VCSEL). Under hybrid electrical and optical pumping conditions, our VCSEL devices show polarization oscillations with frequencies far above the VCSEL's electrical modulation bandwidth. Using multiple optical pulses, we are able to excite and amplify these polarization oscillations. When specific phase and amplitude conditions for the optical excitation pulses are met, destructive interference leads to switch-off of the polarization oscillation, enabling the generation of controlled short polarization bursts.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4862330