Tuning of the Quantum-Confined Stark Effect in Wurtzite \([000\bar{1}]\) Group-III-Nitride Nanostructures by the Internal-Field-Guarded-Active-Region Design

Recently, we suggested an unconventional approach [the so-called Internal-Field-Guarded-Active-Region Design (IFGARD)] for the elimination of the crystal polarization field induced quantum confined Stark effect (QCSE) in polar semiconductor heterostructures. And in this work, we demonstrate by means...

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Bibliographic Details
Published in:arXiv.org 2017-07
Main Authors: Schlichting, S, Hönig, G M O, Müßener, J, Hille, P, Grieb, T, Teubert, J, Schörmann, J, Wagner, M R, Rosenauer, A, Eickhoff, M, Hoffmann, A, Callsen, G
Format: Article
Language:English
Subjects:
Crystal growth
Excitons
Gallium nitrides
Heterostructures
Nanowires
Photoluminescence
Quantum confinement
Stark effect
Tuning
Wurtzite
Online Access:Get full text
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Summary:Recently, we suggested an unconventional approach [the so-called Internal-Field-Guarded-Active-Region Design (IFGARD)] for the elimination of the crystal polarization field induced quantum confined Stark effect (QCSE) in polar semiconductor heterostructures. And in this work, we demonstrate by means of micro-photoluminescence techniques the successful tuning as well as the elimination of the QCSE in strongly polar \([000\bar{1}]\) wurtzite GaN/AlN nanodiscs while reducing the exciton life times by more than two orders of magnitude. The IFGARD based elimination of the QCSE is independent of any specific crystal growth procedures. Furthermore, the cone-shaped geometry of the utilized nanowires (which embeds the investigated IFGARD nanodiscs) facilitates the experimental differentiation between quantum confinement- and QCSE-induced emission energy shifts. Due to the IFGARD, both effects become independently adaptable.
ISSN:2331-8422
DOI:10.48550/arxiv.1707.06882