Email this article Wigner Localization and Whispering Gallery Modes of Electrons in Quantum Dots
- Authors: Mintairov A.M.1,2, Merz J.L.1, Kapaldo J.1, Vlasov A.S.2, Blundell S.A.3
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Affiliations:
- University of Notre Dame
- Ioffe Institute
- Université Grenoble Alpes
- Issue: Vol 52, No 4 (2018)
- Pages: 502-506
- Section: XXV International Symposium “Nanostructures: Physics and Technology”, Saint Petersburg, June 26–30, 2017. Quantum Wells, Quantum Wires, Quantum Dots, and Band Structure
- URL: https://bakhtiniada.ru/1063-7826/article/view/202863
- DOI: https://doi.org/10.1134/S1063782618040218
- ID: 202863
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Abstract
We used a low temperature near-field scanning optical microscopy (NSOM) to study a formation of Wigner molecules (WMs) in the emission spectra of self-organized InP/GaInP QDs having up to seven electrons. We used a Schottky diode structure for the electrostatic control of the number of the electrons (N) in QD, and we observed the emission of the charged excitons (for N < 3) and of the WMs (for N > 2) in the regime of weak Wigner localization. We show, that a contribution of whispering gallery modes (WGMs) of the electrons and rearrangement of the electrons between the WM and WGM states in the QDs, can explain the anomalous dependence of NSOM image size on the quantum confinement observed for some dots.
About the authors
A. M. Mintairov
University of Notre Dame; Ioffe Institute
Author for correspondence.
Email: amintair@nd.edu
United States, Notre Dame, IN, 46556; Saint Petersburg, 194021
J. L. Merz
University of Notre Dame
Email: amintair@nd.edu
United States, Notre Dame, IN, 46556
J. Kapaldo
University of Notre Dame
Email: amintair@nd.edu
United States, Notre Dame, IN, 46556
A. S. Vlasov
Ioffe Institute
Email: amintair@nd.edu
Russian Federation, Saint Petersburg, 194021
S. A. Blundell
Université Grenoble Alpes
Email: amintair@nd.edu
France, Grenoble, F-38000
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