Postselective two-photon interference from a continuous nonclassical stream of photons emitted by a quantum dot

Patel, R. B., Bennett, Anthony ORCID: https://orcid.org/0000-0002-5386-3710, Cooper, K., Atkinson, P., Nicoll, C. A., Ritchie, D. A. and Shields, A. J. 2008. Postselective two-photon interference from a continuous nonclassical stream of photons emitted by a quantum dot. Physical Review Letters 100 (20) , 207405. 10.1103/PhysRevLett.100.207405

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Abstract

We report an electrically driven semiconductor single-photon source capable of emitting photons with a coherence time of up to 400 ps under fixed bias. It is shown that increasing the injection current causes the coherence time to reduce, and this effect is well explained by the fast modulation of a fluctuating environment. Hong-Ou-Mandel-type two-photon interference using a Mach-Zehnder interferometer is demonstrated using this source to test the indistinguishability of individual photons by postselecting events where two photons collide at a beam splitter. Finally, we consider how improvements in our detection system can be used to achieve a higher interference visibility.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	American Physical Society
ISSN:	0031-9007
Date of First Compliant Deposit:	5 December 2017
Last Modified:	06 May 2023 04:33
URI:	https://orca.cardiff.ac.uk/id/eprint/106824

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