Influence of stress on optical transitions in GaN nanorods containing a single InGaN/GaN quantum disk

Y. D. Zhuang, J. Bruckbauer, P. A. Shields, P. R. Edwards, R. W. Martin, D. W. E. Allsopp

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Cathodoluminescence (CL) hyperspectral imaging has been performed on GaN nanorods containing a single InGaN quantum disk (SQD) with controlled variations in excitation conditions. Two different nanorod diameters (200 and 280 nm) have been considered. Systematic changes in the CL spectra from the SQD were observed as the accelerating voltage of the electron beam and its position of incidence are varied. It is shown that the dominant optical transition in the SQD varies across the nanorod as a result of interplay between the contributions of the deformation potential and the quantum-confined Stark effect to the transition energy as consequence of radial variation in the pseudomorphic strain.
LanguageEnglish
Article number174305
Number of pages7
JournalJournal of Applied Physics
Volume116
Issue number17
DOIs
Publication statusPublished - 3 Nov 2014

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optical transition
nanorods
cathodoluminescence
Stark effect
incidence
electron beams
electric potential
excitation
energy

Keywords

  • nanorods
  • electron beams
  • emission spectra
  • quantum wells

Cite this

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title = "Influence of stress on optical transitions in GaN nanorods containing a single InGaN/GaN quantum disk",
abstract = "Cathodoluminescence (CL) hyperspectral imaging has been performed on GaN nanorods containing a single InGaN quantum disk (SQD) with controlled variations in excitation conditions. Two different nanorod diameters (200 and 280 nm) have been considered. Systematic changes in the CL spectra from the SQD were observed as the accelerating voltage of the electron beam and its position of incidence are varied. It is shown that the dominant optical transition in the SQD varies across the nanorod as a result of interplay between the contributions of the deformation potential and the quantum-confined Stark effect to the transition energy as consequence of radial variation in the pseudomorphic strain.",
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author = "Zhuang, {Y. D.} and J. Bruckbauer and Shields, {P. A.} and Edwards, {P. R.} and Martin, {R. W.} and Allsopp, {D. W. E.}",
year = "2014",
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doi = "10.1063/1.4898685",
language = "English",
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journal = "Journal of Applied Physics",
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Influence of stress on optical transitions in GaN nanorods containing a single InGaN/GaN quantum disk. / Zhuang, Y. D.; Bruckbauer, J.; Shields, P. A.; Edwards, P. R.; Martin, R. W.; Allsopp, D. W. E.

In: Journal of Applied Physics, Vol. 116, No. 17, 174305, 03.11.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of stress on optical transitions in GaN nanorods containing a single InGaN/GaN quantum disk

AU - Zhuang, Y. D.

AU - Bruckbauer, J.

AU - Shields, P. A.

AU - Edwards, P. R.

AU - Martin, R. W.

AU - Allsopp, D. W. E.

PY - 2014/11/3

Y1 - 2014/11/3

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AB - Cathodoluminescence (CL) hyperspectral imaging has been performed on GaN nanorods containing a single InGaN quantum disk (SQD) with controlled variations in excitation conditions. Two different nanorod diameters (200 and 280 nm) have been considered. Systematic changes in the CL spectra from the SQD were observed as the accelerating voltage of the electron beam and its position of incidence are varied. It is shown that the dominant optical transition in the SQD varies across the nanorod as a result of interplay between the contributions of the deformation potential and the quantum-confined Stark effect to the transition energy as consequence of radial variation in the pseudomorphic strain.

KW - nanorods

KW - electron beams

KW - emission spectra

KW - quantum wells

U2 - 10.1063/1.4898685

DO - 10.1063/1.4898685

M3 - Article

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JO - Journal of Applied Physics

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