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Narrow optical linewidths and spin pumping on charge-tunable close-to-surface self-assembled quantum dots in an ultrathin diode

Loebl, Matthias C. and Soellner, Immo and Javadi, Alisa and Pregnolato, Tommaso and Schott, Ruediger and Midolo, Leonardo and Kuhlmann, Andreas V. and Stobbe, Soren and Wieck, Andreas D. and Lodahl, Peter and Ludwig, Arne and Warburton, Richard J.. (2017) Narrow optical linewidths and spin pumping on charge-tunable close-to-surface self-assembled quantum dots in an ultrathin diode. Physical Review B, 96 (16). p. 165440.

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Abstract

We demonstrate full charge control, narrow optical linewidths, and optical spin pumping on single self-assembled InGaAs quantum dots embedded in a 162.5−nm-thin diode structure. The quantum dots are just 88nm from the top GaAs surface. We design and realize a p−i−n−i−n diode that allows single-electron charging of the quantum dots at close-to-zero applied bias. In operation, the current flow through the device is extremely small resulting in low noise. In resonance fluorescence, we measure optical linewidths below 2μeV, just a factor of 2 above the transform limit. Clear optical spin pumping is observed in a magnetic field of 0.5T in the Faraday geometry. We present this design as ideal for securing the advantages of self-assembled quantum dots—highly coherent single-photon generation, ultrafast optical spin manipulation—in the thin diodes required in quantum nanophotonics and nanophononics applications.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Physics (Warburton)
UniBasel Contributors:Warburton, Richard J and Löbl, Matthias and Söllner, Immo
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:2469-9950
e-ISSN:2469-9969
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:10 Jan 2018 11:47
Deposited On:10 Jan 2018 11:47

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