Transform-limited single photons from a single quantum dot

Kuhlmann, Andreas V. and Prechtel, Jonathan H. and Houel, Julien and Ludwig, Arne and Reuter, Dirk and Wieck, Andreas D. and Warburton, Richard J.. (2015) Transform-limited single photons from a single quantum dot. Nature communications, 6. p. 8204.

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Official URL: http://edoc.unibas.ch/40718/

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Developing a quantum photonics network requires a source of very-high-fidelity single photons. An outstanding challenge is to produce a transform-limited single-photon emitter to guarantee that single photons emitted far apart in the time domain are truly indistinguishable. This is particularly difficult in the solid-state as the complex environment is the source of noise over a wide bandwidth. A quantum dot is a robust, fast, bright and narrow-linewidth emitter of single photons; layer-by-layer growth and subsequent nano-fabrication allow the electronic and photonic states to be engineered. This represents a set of features not shared by any other emitter but transform-limited linewidths have been elusive. Here, we report transform-limited linewidths measured on second timescales, primarily on the neutral exciton but also on the charged exciton close to saturation. The key feature is control of the nuclear spins, which dominate the exciton dephasing via the Overhauser field.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Physics (Warburton)
UniBasel Contributors:Warburton, Richard J and Kuhlmann, Andreas and Prechtel, Jonathan Hans
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:01
Deposited On:10 May 2016 13:52

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