Optical studies of quantum dot-like emission from localisation centres in InGaN/GaN nanorod array LEDs

C C S Chan, Philip A Shields, M J Holmes, Y Zhuang, X Wang, B P L Reid, H Kim, Duncan W E Allsopp, R A Taylor

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Microphotoluminescence with one-photon and two-photon excitation has been employed to investigate localisation centres found in nanorod array LEDs. Quantum dot-like features with spectral width less than 1 meV were observed originating from low dimensional carrier confinement within the nanorods. Two-photon excitation was used to probe the individual localisation centres. The narrow peak PL energy does not shift with increasing excitation density, but rather an increase of discrete new peaks on the high energy side of the spectrum is observed. There is no temperature dependent emission energy shift observed from 4.3 K to 25 K.
Original languageEnglish
Pages (from-to)635-638
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume9
Issue number3-4
DOIs
Publication statusPublished - Mar 2012

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