Geometrical control of the interatomic coulombic decay process in quantum dots for infrared photodetectors

• Verfasst von: Dolbundalchok, Praphasiri [VerfasserIn]
• Verfasst von: Peláez, Daniel [VerfasserIn]
• Verfasst von: Aziz, Emad F. [VerfasserIn]
• Verfasst von: Bande, Annika [VerfasserIn]
• Titel: Geometrical control of the interatomic coulombic decay process in quantum dots for infrared photodetectors
• Verf.angabe: Praphasiri Dolbundalchok, Daniel Peláez, Emad F. Aziz, and Annika Bande
• E-Jahr: 2016
• Jahr: 25 July 2016
• Umfang: 11 S.
• Fussnoten: Gesehen am 11.05.2020
• Titel Quelle: Enthalten in: Journal of computational chemistry
• Ort Quelle: New York, NY [u.a.] : Wiley, 1980
• Jahr Quelle: 2016
• Band/Heft Quelle: 37(2016), 25, Seite 2249-2259
• ISSN Quelle: 1096-987X
• DOI: doi:10.1002/jcc.24410
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: dynamics
• Sach-SW: electronic-structure
• Sach-SW: energy exchange
• Sach-SW: model
• Sach-SW: systems
• K10plus-PPN: 1697823564

Abstract

In electron dynamics calculations the interatomic Coulombic decay (ICD) process has recently been shown to take place in two vertically-aligned quantum dots (QDs). Energy emitted during the relaxation of one electron in one QD is converted into kinetic energy of another electron ejected from a neighboring QD. As the electronic structure of QDs can be controlled by their geometries, we prove here in thorough scans of the transversal and vertical QD confinement potentials’ widths that geometries are likewise control parameters for ICD. Such a comprehensive investigation has been enabled by a significant development of the calculations in terms of speed achieved among others by optimization of the grid and Coulomb interaction operator representations. As key result of this study we propose two cigar-shaped singly-charged GaAs QDs vertically aligned in the direction of their long side for a most efficient QD ICD realization useful for an infrared photodetector. © 2016 Wiley Periodicals, Inc.