Strain-induced g-factor tuning in single InGaAs/GaAs quantum dots

H. M. G. A. Tholen; J. S. Wildmann; A. Rastelli; R. Trotta; C. E. Pryor; E. Zallo; O. G. Schmidt; P. M. Koenraad; A. Yu Silov

doi:10.1103/PhysRevB.94.245301

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Strain-induced g-factor tuning in single InGaAs/GaAs quantum dots

Journal article

Peer reviewed

Strain-induced g-factor tuning in single InGaAs/GaAs quantum dots

H. M. G. A. Tholen, J. S. Wildmann, A. Rastelli, R. Trotta, C. E. Pryor, E. Zallo, O. G. Schmidt, P. M. Koenraad and A. Yu Silov

Physical review. B, Vol.94(24), pp.1-6

12/02/2016

DOI: 10.1103/PhysRevB.94.245301

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Abstract

The tunability of the exciton g factor in InGaAs quantum dots using compressive biaxial stress applied by piezoelectric actuators is investigated. We find a clear relation between the exciton g factor and the applied stress. A linear decrease of the g factor with compressive biaxial strain is observed consistently in all investigated dots. A connection is established between the response of the exciton g factor to the voltage applied to the piezoelectric actuator and the response of the quantum dot emission energy. We employ a numerical model based on eight-band k.p theory to calculate the exciton g factor of a typical dot as a function of strain and a good agreement with our experiments is found. Our calculations reveal that the change in exciton g factor is dominated by the contribution of the valence band and originates from increased heavy hole light hole splitting when applying external stress.

Materials Science

Materials Science, Multidisciplinary

Physical Sciences

Physics

Physics, Applied

Physics, Condensed Matter

Science & Technology

Technology

Details

Title: Subtitle: Strain-induced g-factor tuning in single InGaAs/GaAs quantum dots
Creators: H. M. G. A. Tholen - Eindhoven University of Technology
J. S. Wildmann - Johannes Kepler University of Linz
A. Rastelli - Johannes Kepler University of Linz
R. Trotta - Johannes Kepler University of Linz
C. E. Pryor - University of Iowa
E. Zallo - Paul Drude Institute for Solid State Electronics
O. G. Schmidt - Leibniz Institute for Solid State and Materials Research
P. M. Koenraad - Eindhoven University of Technology
A. Yu Silov - Eindhoven University of Technology
Resource Type: Journal article
Publication Details: Physical review. B, Vol.94(24), pp.1-6
DOI: 10.1103/PhysRevB.94.245301
ISSN: 2469-9950
eISSN: 2469-9969
Publisher: Amer Physical Soc
Number of pages: 6
Grant note: 022.005.011 / Graduate Programme of the Netherlands Organisation for Scientific Research (NWO)
Language: English
Date published: 12/02/2016
Academic Unit: Physics and Astronomy
Record Identifier: 9984429054602771

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