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Title: Lateral excitonic switching in vertically stacked quantum dots

Abstract

We show that the application of a vertical electric field to the Coulomb interacting system in stacked quantum dots leads to a 90° in-plane switching of charge probability distribution in contrast to a single dot, where no such switching exists. Results are obtained using path integral quantum Monte Carlo with realistic dot geometry, alloy composition, and piezo-electric potential profiles. The origin of the switching lies in the strain interactions between the stacked dots hence the need for more than one layer of dots. The lateral polarization and electric field dependence of the radiative lifetimes of the excitonic switch are also discussed.

Authors:
; ;  [1];  [2]
  1. Institute of Photonics and Quantum Sciences, SUPA, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)
  2. Department of Physics, Arizona State University, Tempe, Arizona 85287 (United States)
Publication Date:
OSTI Identifier:
22596787
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 119; Journal Issue: 22; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALLOYS; COULOMB FIELD; DISTRIBUTION; ELECTRIC POTENTIAL; GEOMETRY; INTERACTIONS; LAYERS; MONTE CARLO METHOD; PATH INTEGRALS; POLARIZATION; PROBABILITY; QUANTUM DOTS; SWITCHES

Citation Formats

Jarzynka, Jarosław R., McDonald, Peter G., Galbraith, Ian, and Shumway, John. Lateral excitonic switching in vertically stacked quantum dots. United States: N. p., 2016. Web. doi:10.1063/1.4953391.
Jarzynka, Jarosław R., McDonald, Peter G., Galbraith, Ian, & Shumway, John. Lateral excitonic switching in vertically stacked quantum dots. United States. doi:10.1063/1.4953391.
Jarzynka, Jarosław R., McDonald, Peter G., Galbraith, Ian, and Shumway, John. Tue . "Lateral excitonic switching in vertically stacked quantum dots". United States. doi:10.1063/1.4953391.
@article{osti_22596787,
title = {Lateral excitonic switching in vertically stacked quantum dots},
author = {Jarzynka, Jarosław R. and McDonald, Peter G. and Galbraith, Ian and Shumway, John},
abstractNote = {We show that the application of a vertical electric field to the Coulomb interacting system in stacked quantum dots leads to a 90° in-plane switching of charge probability distribution in contrast to a single dot, where no such switching exists. Results are obtained using path integral quantum Monte Carlo with realistic dot geometry, alloy composition, and piezo-electric potential profiles. The origin of the switching lies in the strain interactions between the stacked dots hence the need for more than one layer of dots. The lateral polarization and electric field dependence of the radiative lifetimes of the excitonic switch are also discussed.},
doi = {10.1063/1.4953391},
journal = {Journal of Applied Physics},
number = 22,
volume = 119,
place = {United States},
year = {Tue Jun 14 00:00:00 EDT 2016},
month = {Tue Jun 14 00:00:00 EDT 2016}
}