title: Optical Properties of a Quantum Dot-Ring System Grown Using Droplet Epitaxy.
abstract: Electronic and optical properties of InAs/GaAs nanostructures grown by the droplet epitaxy method are studied. Carrier states were determined by k · p theory including effects of strain and In gradient concentration for a model geometry. Wavefunctions are highly localized in the dots. Coulomb and exchange interactions are studied and we found the system is in the strong confinement regime. Microphotoluminescence spectra and lifetimes were calculated and compared with measurements performed on a set of quantum rings in a single sample. Some features of spectra are in good agreement.
authors.affiliation: Instituto de Física, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y, Blvd. 18 Sur Edif. 1IF1, Cd. Universitaria, Puebla, Mexico. glinares@ifuap.buap.mx.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Linares-García
authors.affiliation: Instituto de Física, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y, Blvd. 18 Sur Edif. 1IF1, Cd. Universitaria, Puebla, Mexico.
authors.forename: Lilia
authors.identifier: http://orcid.org/0000-0002-0053-0189
authors.initials: L
authors.lastname: Meza-Montes
authors.affiliation: Department of Physics & Astronomy, Ohio University, Athens, OH, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Stinaff
authors.affiliation: Department of Physics & Astronomy, Ohio University, Athens, OH, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Alsolamy
authors.affiliation: Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Ware
authors.affiliation: Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, USA.
authors.forename: Y I
authors.initials: YI
authors.lastname: Mazur
authors.affiliation: Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, USA.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Wang
authors.affiliation: Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, USA.|College of Electronics and Information, Kwangwoon University, Nowon-gu Seoul, 01897, South Korea.
authors.forename: Jihoon
authors.initials: J
authors.lastname: Lee
authors.affiliation: Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, USA.
authors.forename: G J
authors.initials: GJ
authors.lastname: Salamo
keywords: Finite element; Lifetime of excitons; Photoluminescence; Quantum dots; Quantum rings