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

A. J. Bennett; Y. Cao; D. J. P. Ellis; I. Farrer; D. A. Ritchie; A. J. Shields

doi:10.1117/12.2076271

27 February 2015 Combining fast electrical control and resonant excitation to create a wavelength-tunable and coherent quantum-dot light source

A. J. Bennett, Y. Cao, D. J. P. Ellis, I. Farrer, D. A. Ritchie, A. J. Shields

Author Affiliations +

Proceedings Volume 9373, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII; 937302 (2015) https://doi.org/10.1117/12.2076271
Event: SPIE OPTO, 2015, San Francisco, California, United States

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.

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A. J. Bennett, Y. Cao, D. J. P. Ellis, I. Farrer, D. A. Ritchie, and A. J. Shields "Combining fast electrical control and resonant excitation to create a wavelength-tunable and coherent quantum-dot light source", Proc. SPIE 9373, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XII, 937302 (27 February 2015); https://doi.org/10.1117/12.2076271

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