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Applied Physics Letters / Volume 99 / Issue 15 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 99, 151107 (2011); http://dx.doi.org/10.1063/1.3651339 (3 pages)

Ultrafast spin-induced polarization oscillations with tunable lifetime in vertical-cavity surface-emitting lasers

N. C. Gerhardt1, M. Y. Li1, H. Jähme1, H. Höpfner1, T. Ackemann2, and M. R. Hofmann1

1Photonics and Terahertz Technology, Ruhr-University Bochum, D-44780 Bochum, Germany
2SUPA and Department of Physics, University of Strathclyde, Glasgow G4 0NG, Scotland, United Kingdom

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(Received 18 August 2011; accepted 22 September 2011; published online 11 October 2011)

We report spin-induced polarization oscillations in vertical-cavity surface-emitting lasers above threshold and at room temperature. The oscillation frequency is 11.6 GHz, which is significantly higher than the modulation bandwidth of less than 4 GHz in the device. The oscillation frequency is determined by an additional resonance frequency in birefringence containing microcavities, which is potentially much higher than the conventional relaxation oscillation frequency. The damping of the oscillations can be controlled by the current, allowing for oscillation lifetimes much longer than the spin lifetime in the device as well as for short bursts potentially interesting for information transmission.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

birefringence, high-speed optical techniques, light polarisation, surface emitting lasers

PACS

  • 42.60.Da

    Resonators, cavities, amplifiers, arrays, and rings

  • 42.55.Px

    Semiconductor lasers; laser diodes

  • 42.65.Re

    Ultrafast processes; optical pulse generation and pulse compression

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3651339

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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