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Lookup NU author(s): Dr Jonathan Mar
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.
For re-use rights please refer to the publisher's terms and conditions.
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.
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
Date deposited: 15/06/2020
ISSN (print): 1742-6588
ISSN (electronic): 1742-6596
Publisher: Institute of Physics Publishing Ltd.
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