Atomically sharp, crystal phase defined GaAs quantum dots

Irene Geijselaers; Neimantas Vainorius; Sebastian Lehmann; Craig E. Pryor; Kimberly A. Dick; Mats-Erik Pistol

doi:10.1063/5.0072151

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Atomically sharp, crystal phase defined GaAs quantum dots

Journal article

Open access

Peer reviewed

Atomically sharp, crystal phase defined GaAs quantum dots

Irene Geijselaers, Neimantas Vainorius, Sebastian Lehmann, Craig E. Pryor, Kimberly A. Dick and Mats-Erik Pistol

Applied physics letters, Vol.119(26), p.263102

12/27/2021

DOI: 10.1063/5.0072151

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Abstract

Crystal phase defined heterostructures, or polytype heterostructures, are atomically sharp with no intermixing, which makes them ideal contenders for a wide range of applications. Although polytype quantum dots have shown promising results as single photon sources, a high degree of control on the dimensions and the number of polytype quantum dots is necessary before any application can be developed. In this work, we show results from optical characterization of highly controlled wurtzite (wz)-zinc blende (zb) GaAs quantum dots with sharp photoluminescence signal and a strong indication of 0D density of states. One band effective mass calculations show good agreement with the measured data. Radially confined nanowires with a single wz-zb GaAs interface also show sharp photoluminescence signal and 0D density of states. This indicates the existence of quantum dot like states in triangular wells formed at the wz-zb GaAs interface. These results show the potential of polytype quantum dots for physics and optics applications. (C) 2021 Author(s).

Physical Sciences

Physics

Physics, Applied

Science & Technology

Details

Title: Subtitle: Atomically sharp, crystal phase defined GaAs quantum dots
Creators: Irene Geijselaers - Lund University
Neimantas Vainorius - Lund University
Sebastian Lehmann - Lund University
Craig E. Pryor - University of Iowa
Kimberly A. Dick - Lund University
Mats-Erik Pistol - Lund University
Resource Type: Journal article
Publication Details: Applied physics letters, Vol.119(26), p.263102
DOI: 10.1063/5.0072151
ISSN: 0003-6951
eISSN: 1077-3118
Publisher: AIP Publishing
Number of pages: 5
Grant note: NanoLund Swedish Research Council; Swedish Research Council for Health Working Life & Welfare (Forte); Swedish Research Council Formas Knut and Alice Wallenberg Foundation; Knut & Alice Wallenberg Foundation
Language: English
Date published: 12/27/2021
Academic Unit: Physics and Astronomy
Record Identifier: 9984428805402771

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