Fast electro-optics of a single self-assembled quantum dot in a charge-tunable device

Prechtel, J.H., Dalgarno, P.A., Hadfield, R. , McFarlane, J., Badolato, A., Petroff, P.M. and Warburton, R.J. (2012) Fast electro-optics of a single self-assembled quantum dot in a charge-tunable device. Journal of Applied Physics, 111(4), 043112. (doi:10.1063/1.3687375)

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Abstract

The response of a single InGaAs quantum dot, embedded in a miniaturized charge-tunable device, to an applied GHz bandwidth electrical pulse is investigated via its optical response. Quantum-dot response times of 1.0 ± 0.1 ns are characterized via several different measurement techniques, demonstrating GHz-bandwidth electrical control. Furthermore, a novel optical detection technique based on resonant electron-hole pair generation in the hybridization region is used to map fully the voltage pulse experienced by the quantum dot, showing, in this case, a simple exponential rise.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert
Authors: Prechtel, J.H., Dalgarno, P.A., Hadfield, R., McFarlane, J., Badolato, A., Petroff, P.M., and Warburton, R.J.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Journal of Applied Physics
Publisher:American Institute of Physics
ISSN:0021-8979
Published Online:29 February 2012

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