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Proceedings Paper

Combining fast electrical control and resonant excitation to create a wavelength-tunable and coherent quantum-dot light source
Author(s): A. J. Bennett; Y. Cao; D. J. P. Ellis; I. Farrer; D. A. Ritchie; A. J. Shields
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Paper Abstract

We have realized an ultrafast diode containing a single quantum dot, whose transitions can be Stark shifted in a few hundred picoseconds. Carrying out resonant excitation of this sample we demonstrate pulsed single photon emission with high spectral purity, by rapidly sweeping the neutral exciton transition into and out of the laser energy. Detailed study of the detuning dependence of the fluorescence reveals sources of decoherence in this sample, which we show can be filtered out with narrow-band excitation.

Paper Details

Date Published: 27 February 2015
PDF: 6 pages
Proc. SPIE 9373, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII, 937302 (27 February 2015); doi: 10.1117/12.2076271
Show Author Affiliations
A. J. Bennett, Toshiba Research Europe Ltd. (United Kingdom)
Y. Cao, Toshiba Research Europe Ltd. (United Kingdom)
Imperial College London (United Kingdom)
D. J. P. Ellis, Toshiba Research Europe Ltd. (United Kingdom)
I. Farrer, Univ. of Cambridge (United Kingdom)
D. A. Ritchie, Univ. of Cambridge (United Kingdom)
A. J. Shields, Toshiba Research Europe Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 9373:
Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII
Diana L. Huffaker; Holger Eisele, Editor(s)

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