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Media type:
E-Article
Title:
Single photon emission of a charge-tunable GaAs/Al0.25Ga0.75As droplet quantum dot device
Contributor:
Langer, Fabian;
Plischke, David;
Kamp, Martin;
Höfling, Sven
Published:
AIP Publishing, 2014
Published in:
Applied Physics Letters, 105 (2014) 8
Language:
English
DOI:
10.1063/1.4894372
ISSN:
0003-6951;
1077-3118
Origination:
Footnote:
Description:
In this work, we report the fabrication of a charge-tunable GaAs/Al0.25Ga0.75As quantum dot (QD) device containing QDs deposited by modified droplet epitaxy producing almost strain and composition gradient free QDs. We obtained a QD density in the low 109 cm−2 range that enables us to perform spectroscopy on single droplet QDs showing linewidths as narrow as 40 μeV. The integration of the QDs into a Schottky diode allows us to controllably charge a single QD with up to four electrons, while non-classical photoluminescence is proven by photon auto-correlation measurements showing photon-antibunching (g(2)(0) = 0.05).