Spatially resolved investigation of competing nanocluster emission in quantum-disks-in-nanowires structure characterized by nanoscale cathodoluminescence

Aditya Prabaswara, David J. Stowe, Bilal Janjua, Tien Khee Ng, Dalaver H. Anjum, Paolo Longo, Chao Zhao, Rami T. Elafandy, Xiaohang Li, Ahmed Y. Alyamani, Munir M. El-Desouki, Boon S. Ooi

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1 Scopus citations

Abstract

We report on the study and characterization of nanoclusters-related recombination centers within quantum-disks-in-nanowires heterostructure by utilizing microphotoluminescence (mu-PL) and cathodoluminescence scanning transmission electron microscopy (CL-STEM). mu-PL measurement shows that the nanoclusters-related recombination center exhibits different temperature-dependent characteristics compared with the surrounding InGaN quantum-disksrelated recombination center. CL-STEM measurements reveal that these recombination centers mainly arise from irregularities within the quantum disks, with a strong, spatially localized emission when measured at low temperature. The spectra obtained from both CL-STEM and mu-PL correlate well with each other. Our work sheds light on the optical and structural properties of simultaneously coexisting recombination centers within nanowires heterostructures. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
Original languageEnglish (US)
Pages (from-to)026015
JournalJournal of Nanophotonics
Volume11
Issue number2
DOIs
StatePublished - Jun 30 2017

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