Projects per year
Abstract
Multiple luminescence peaks emitted by a single InGaN/GaN quantum-well(QW) nanorod, extending from the blue to the red, were analysed by a combination of electron microscope based imaging techniques. Utilizing the capability of cathodoluminescence hyperspectral imaging it was possible to investigate spatial variations in the luminescence properties on a nanoscale. The high optical quality of a single GaN nanorod was demonstrated, evidenced by a narrow band-edge peak and the absence of any luminescence associated with the yellow defect band. Additionally two spatially confined broad luminescence bands were observed, consisting of multiple peaks ranging from 395nm to 480nm and 490nm to 650 nm. The lower energy band originates from broad c-plane QWs located at the apex of the nanorod and the higher energy band from the semipolar QWs on the pyramidal nanorod tip. Comparing the experimentally observed peak positions with peak positions obtained from plane wave modelling and 3D finite difference time domain(FDTD) modelling shows modulation of the nanorod luminescence by cavity modes. By studying the influence of these modes we demonstrate that this can be exploited as an additional parameter in engineering the emission profile of LEDs.
Original language | English |
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Article number | 1742 |
Number of pages | 8 |
Journal | Scientific Reports |
Volume | 8 |
Issue number | 1 |
DOIs | |
Publication status | Published - 29 Jan 2018 |
Keywords
- luminescence
- InGaN/GaN quantum-well
- nanorods
- hyperspectral imaging
- LEDs
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Dive into the research topics of 'Multi-wavelength emission from a single InGaN/GaN nanorod analyzed by cathodoluminescence hyperspectral imaging'. Together they form a unique fingerprint.Projects
- 1 Finished
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Advanced III-nitride materials for next generation UV emitters used in water purification, environmental protection and local network communication
Martin, R. (Principal Investigator)
EPSRC (Engineering and Physical Sciences Research Council)
31/12/14 → 30/12/18
Project: Research
Datasets
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Dataset for characterisation of multi-wavelength emission from a single InGaN/GaN nanorod
Kusch, G. (Creator), Edwards, P. (Creator), Martin, R. (Creator), Pugh, J. (Contributor) & Cryan, M. J. (Contributor), University of Strathclyde, 17 Jan 2018
DOI: 10.15129/a24bd3fd-0493-4cd2-84ed-551abff86060
Dataset