Cavity-enhanced coherent light scattering from a quantum dot

Bennett, Anthony J., Lee, James P., Ellis, David J. P., Meany, Thomas, Murray, Eoin, Floether, Frederik F., Griffths, Jonathan P., Farrer, Ian, Ritchie, David A. and Shields, Andrew J. 2016. Cavity-enhanced coherent light scattering from a quantum dot. Science Advances 2 (4) , e1501256. 10.1126/sciadv.1501256

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Abstract

The generation of coherent and indistinguishable single photons is a critical step for photonic quantum technologies in information processing and metrology. A promising system is the resonant optical excitation of solid-state emitters embedded in wavelength-scale three-dimensional cavities. However, the challenge here is to reject the unwanted excitation to a level below the quantum signal. We demonstrate this using coherent photon scattering from a quantum dot in a micropillar. The cavity is shown to enhance the fraction of light that is resonantly scattered toward unity, generating antibunched indistinguishable photons that are 16 times narrower than the time-bandwidth limit, even when the transition is near saturation. Finally, deterministic excitation is used to create two-photon N00N states with which we make superresolving phase measurements in a photonic circuit.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Uncontrolled Keywords:	Quantum physics; photon; resonant; cavity
Additional Information:	This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
Publisher:	American Association for the Advancement of Science
ISSN:	2375-2548
Date of First Compliant Deposit:	27 November 2017
Date of Acceptance:	25 March 2016
Last Modified:	03 Dec 2020 14:30
URI:	https://orca.cardiff.ac.uk/id/eprint/106841

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