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Single-photon sources with optical fibre integration

Lookup NU author(s): Dr Jonathan Mar

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This is the final published version of an article that has been published in its final definitive form by Institute of Physics Publishing Ltd., 2007.

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Abstract

We report a 'plug and play' single-photon source based on single quantum dots with an integrated optical fibre output. We attach an optical fibre to the sample surface in order to measure single-dot photoluminescence, which avoids the light coupling between quantum dots and free space. The excitation light (a HeNe Laser) is coupled into the optical fibre to excite the quantum dots, and the emitted photoluminescence is collected with same optical fibre. To verify the emission of single photons, correlation measurements of the luminescence were performed using a Hanbury Brown and Twiss setup with a 50/50 beamsplitter and two single-photon counting avalanche photodiodes. Clear antibunching with the second-order correlation function at zero time delay less than 0.1 indicates single-photon emission. The devices are stable, and reproducible for an arbitrarily long time, which is very promising for real implementations of quantum key distribution and linear optical quantum computation.

Publication metadata

Author(s): Xu X, Toft I, Mar J, Hammura K, Phillips RT, Williams DA

Publication type: Article

Publication status: Published

Journal: Journal of Physics: Conference Series

Year: 2007

Volume: 61

Date deposited: 15/06/2020

ISSN (print): 1742-6588

ISSN (electronic): 1742-6596

Publisher: Institute of Physics Publishing Ltd.

URL: https://doi.org/10.1088/1742-6596/61/1/251

DOI: 10.1088/1742-6596/61/1/251

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