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Main Title: Tuning the Emission Directionality of Stacked Quantum Dots
Author(s): Greif, Ludwig Albrecht Thorsten
Jagsch, Stefan Thomas
Wagner, Markus R.
Schliwa, Andrei
Type: Article
Is Part Of: 10.14279/depositonce-9133
Referenced By: 10.14279/depositonce-10409
Language Code: en
Abstract: The emission directionality of stacks of coupled quantum dots (QDs) is investigated within the framework of 8-band k·p-theory including strain and strain-induced piezoelectricity up to second order. Using an artificial cuboidal QD, we show that the degree of radiation anisotropy can be tuned from −33% to nearly +60% via the structure’s vertical aspect ratio. We then demonstrate that these findings can be transferred to stacked InGaAs QDs whose emission directionality is tailored (i) via the interdot coupling strength given by the separating barrier width and (ii) the number of stacked QDs. Our results enable the design and optimization of top and edge emitters based on stacked QDs.
Issue Date: 2-Nov-2018
Date Available: 21-Aug-2020
DDC Class: 530 Physik
Subject(s): self-assembled quantum dots
radiation pattern
light-hole ground state
valence band mixing
Sponsor/Funder: DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
Journal Title: ACS Photonics
Publisher: American Chemical Society (ACS)
Publisher Place: Washington, DC
Volume: 5
Issue: 12
Publisher DOI: 10.1021/acsphotonics.8b00956
Page Start: 4838
Page End: 4845
EISSN: 2330-4022
Appears in Collections:FG Optische Charakterisierung von Halbleitern » Publications

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