Combining fast electrical control and resonant excitation to create a wavelength-tunable and coherent quantum-dot light source

Bennett, Anthony ORCID: https://orcid.org/0000-0002-5386-3710, Cao, Y., Ellis, D. J. P., Farrer, I., Ritchie, D. A. and Shields, A. J. 2015. Combining fast electrical control and resonant excitation to create a wavelength-tunable and coherent quantum-dot light source. Presented at: SPIE OPTO, San Francisco, CA, USA, 7-12 February 2015. Published in: Huffaker, Diana L. and Eisele, Eisele eds. Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII. QUANTUM DOTS AND NANOSTRUCTURES: SYNTHESIS CHARACTERIZATION AND MODELING XII. Proceedings of SPIE (9373) SPIE, 10.1117/12.2076271

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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.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	SPIE
ISBN:	9781628414639
ISSN:	0277-786X
Last Modified:	03 Nov 2022 09:55
URI:	https://orca.cardiff.ac.uk/id/eprint/106433

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