Type II InAs/GaAsSb quantum dots: Highly tunable exciton geometry and topology

Llorens Molina, Juan Antonio and Wewior, L. and Cardozo de Oliveira, E.R. and Ulloa Herrero, José María and Utrilla Lomas, Antonio David and Fernández González, Alvaro de Guzmán and Hierro Cano, Adrián and Alén Millán, Benito (2015). Type II InAs/GaAsSb quantum dots: Highly tunable exciton geometry and topology. "Applied Physics Letters", v. 107 (n. 18); pp.. ISSN 0003-6951. https://doi.org/10.1063/1.4934841.

Description

Title: Type II InAs/GaAsSb quantum dots: Highly tunable exciton geometry and topology
Author/s:
  • Llorens Molina, Juan Antonio
  • Wewior, L.
  • Cardozo de Oliveira, E.R.
  • Ulloa Herrero, José María
  • Utrilla Lomas, Antonio David
  • Fernández González, Alvaro de Guzmán
  • Hierro Cano, Adrián
  • Alén Millán, Benito
Item Type: Article
Título de Revista/Publicación: Applied Physics Letters
Date: November 2015
ISSN: 0003-6951
Volume: 107
Subjects:
Faculty: Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

External control over the electron and hole wavefunctions geometry and topology is investigated in a p-i-n diode embedding a dot-in-a-well InAs/GaAsSb quantum structure with type II band alignment. We find highly tunable exciton dipole moments and largely decoupled exciton recombination and ionization dynamics. We also predicted a bias regime where the hole wavefunction topology changes continuously from quantum dot-like to quantum ring-like as a function of the external bias. All these properties have great potential in advanced electro-optical applications and in the investigation of fundamental spin-orbit phenomena.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainENE2012-37804-C02-02UnspecifiedUnspecifiedUnspecified
Government of SpainTEC2011-29120-C05-04UnspecifiedUnspecifiedUnspecified
Government of SpainMAT2013-47102-C2-2-RUnspecifiedUnspecifiedUnspecified
Madrid Regional GovernmentS2013/MAE-2780UnspecifiedUnspecifiedUnspecified

More information

Item ID: 40924
DC Identifier: http://oa.upm.es/40924/
OAI Identifier: oai:oa.upm.es:40924
DOI: 10.1063/1.4934841
Official URL: http://scitation.aip.org/content/aip/journal/apl/107/18/10.1063/1.4934841
Deposited by: Memoria Investigacion
Deposited on: 07 Sep 2016 16:49
Last Modified: 05 Jun 2019 17:49
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