Correlations between optical properties and Voronoi-cell area of quantum dots

Loebl, Matthias C. and Zhai, Liang and Jahn, Jan-Philipp and Ritzmann, Julian and Huo, Yongheng and Wieck, Andreas D. and Schmidt, Oliver G. and Ludwig, Arne and Rastelli, Armando and Warburton, Richard J.. (2019) Correlations between optical properties and Voronoi-cell area of quantum dots. Physical Review B, 100 (15). p. 155402.

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A semiconductor quantum dot (QD) can generate highly indistinguishable single photons at a high rate. For application in quantum communication and integration in hybrid systems, control of the QD optical properties is essential. Understanding the connection between the optical properties of a QD and the growth process is therefore important. Here, we show for GaAs QDs, grown by infilling droplet-etched nanoholes, that the emission wavelength, the neutral-to-charged exciton splitting, and the diamagnetic shift are strongly correlated with the capture-zone area, an important concept from nucleation theory. We show that the capture-zone model applies to the growth of this system even in the limit of a low QD density in which atoms diffuse over mu m distances. The strong correlations between the various QD parameters facilitate preselection of QDs for applications with specific requirements on the QD properties; they also suggest that a spectrally narrowed QD distribution will result if QD growth on a regular lattice can be achieved.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Physics (Warburton)
UniBasel Contributors:Warburton, Richard J and Zhai, Liang and Jahn, Jan-Philipp
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:16 Apr 2020 13:21
Deposited On:16 Apr 2020 13:21

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