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

doi:10.1063/1.4898685

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

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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.

Original language	English
Article number	174305
Number of pages	7
Journal	Journal of Applied Physics
Volume	116
Issue number	17
DOIs	https://doi.org/10.1063/1.4898685
Publication status	Published - 3 Nov 2014

Keywords

nanorods
electron beams
emission spectra
quantum wells

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10.1063/1.4898685

Zhuang2014JAP116Final published version, 1.65 MB

Gallium nitride enabled hybrid and flexible photonics
Dawson, M., Calvez, S., Gu, E., Martin, R., Skabara, P. & Watson, I.
EPSRC (Engineering and Physical Sciences Research Council)
1/04/11 → 31/03/15
Project: Research
Lighting the future
Martin, R. & Skabara, P.
EPSRC (Engineering and Physical Sciences Research Council)
1/12/10 → 30/11/15
Project: Research

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.",

keywords = "nanorods, electron beams, emission spectra, quantum wells",

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",

month = nov,

day = "3",

doi = "10.1063/1.4898685",

language = "English",

volume = "116",

journal = "Journal of Applied Physics",

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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

N2 - 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.

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

SN - 0021-8979

VL - 116

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 17

M1 - 174305

ER -

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

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Keywords

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Gallium nitride enabled hybrid and flexible photonics

Lighting the future

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