Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach

Abstract We theoretically investigate the electron and hole states in a semiconductor quantum dot-quantum ring coupled structure, inspired by the recent experimental report by Elborg and collaborators (2017). The finite element method constitutes the numerical technique used to solve the three-dimen...

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Autores principales:	M. E. Mora-Ramos, J. A. Vinasco, D. Laroze, A. Radu, R. L. Restrepo, Christian Heyn, V. Tulupenko, Nguyen N. Hieu, Huynh V. Phuc, J. H. Ojeda, A. L. Morales, C. A. Duque
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fe3666c71b104b12939f93f1b673997f
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spelling	oai:doaj.org-article:fe3666c71b104b12939f93f1b673997f2021-12-02T14:21:58ZElectronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach10.1038/s41598-021-83583-52045-2322https://doaj.org/article/fe3666c71b104b12939f93f1b673997f2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83583-5https://doaj.org/toc/2045-2322Abstract We theoretically investigate the electron and hole states in a semiconductor quantum dot-quantum ring coupled structure, inspired by the recent experimental report by Elborg and collaborators (2017). The finite element method constitutes the numerical technique used to solve the three-dimensional effective mass equation within the parabolic band approximation, including the effects of externally applied electric and magnetic fields. Initially, the features of conduction electron states in the proposed system appear discussed in detail, under different geometrical configurations and values of the intensity of the aforementioned electromagnetic probes. In the second part, the properties of an electron-hole pair confined within the very kind of structure reported in the reference above are investigated via a model that tries to reproduce as close as possible the developed profile. In accordance, we report on the energies of confined electron and hole, affected by the influence of an external electric field, revealing the possibility of field-induced separate spatial localization, which may result in an indirect exciton configuration. In relation with this fact, we present a preliminary analysis of such phenomenon via the calculation of the Coulomb integral.M. E. Mora-RamosJ. A. VinascoD. LarozeA. RaduR. L. RestrepoChristian HeynV. TulupenkoNguyen N. HieuHuynh V. PhucJ. H. OjedaA. L. MoralesC. A. DuqueNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. E. Mora-Ramos J. A. Vinasco D. Laroze A. Radu R. L. Restrepo Christian Heyn V. Tulupenko Nguyen N. Hieu Huynh V. Phuc J. H. Ojeda A. L. Morales C. A. Duque Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach
description	Abstract We theoretically investigate the electron and hole states in a semiconductor quantum dot-quantum ring coupled structure, inspired by the recent experimental report by Elborg and collaborators (2017). The finite element method constitutes the numerical technique used to solve the three-dimensional effective mass equation within the parabolic band approximation, including the effects of externally applied electric and magnetic fields. Initially, the features of conduction electron states in the proposed system appear discussed in detail, under different geometrical configurations and values of the intensity of the aforementioned electromagnetic probes. In the second part, the properties of an electron-hole pair confined within the very kind of structure reported in the reference above are investigated via a model that tries to reproduce as close as possible the developed profile. In accordance, we report on the energies of confined electron and hole, affected by the influence of an external electric field, revealing the possibility of field-induced separate spatial localization, which may result in an indirect exciton configuration. In relation with this fact, we present a preliminary analysis of such phenomenon via the calculation of the Coulomb integral.
format	article
author	M. E. Mora-Ramos J. A. Vinasco D. Laroze A. Radu R. L. Restrepo Christian Heyn V. Tulupenko Nguyen N. Hieu Huynh V. Phuc J. H. Ojeda A. L. Morales C. A. Duque
author_facet	M. E. Mora-Ramos J. A. Vinasco D. Laroze A. Radu R. L. Restrepo Christian Heyn V. Tulupenko Nguyen N. Hieu Huynh V. Phuc J. H. Ojeda A. L. Morales C. A. Duque
author_sort	M. E. Mora-Ramos
title	Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach
title_short	Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach
title_full	Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach
title_fullStr	Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach
title_full_unstemmed	Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach
title_sort	electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. a finite-element approach
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fe3666c71b104b12939f93f1b673997f
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Electronic structure of vertically coupled quantum dot-ring heterostructures under applied electromagnetic probes. A finite-element approach

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