Quantum Optoelectronics

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Cavity modes of tapered ZnO nanowires

NEW JOURNAL OF PHYSICS 12 (2010) ARTN 083052

Authors:

Xiulai Xu, Frederic SF Brossard, David A Williams, Daniel P Collins, Mark J Holmes, Robert A Taylor, Xitian Zhang
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High Up-Conversion Efficiency of YVO4:Yb,Er Nanoparticles in Water down to the Single-Particle Level

JOURNAL OF PHYSICAL CHEMISTRY C 114:51 (2010) 22449-22454

Authors:

Genevieve Mialon, Silvan Tuerkcan, Geraldine Dantelle, Daniel P Collins, Maria Hadjipanayi, Robert A Taylor, Thierry Gacoin, Antigoni Alexandrou, Jean-Pierre Boilott
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Micro- and Time-resolved Photoluminescence in GaN Nanorods with Different Diameters

JOURNAL OF THE KOREAN PHYSICAL SOCIETY 57:4 (2010) 756-759

Authors:

Young S Park, Hyunsik Im, Im T Yoon, Sun-Kyun Lee, Yong-Hoon Cho, Robert A Taylor
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Photoluminescence and Electroluminescence in InGaN/GaN Nano-rod Array LEDs Fabricated on a Wafer Scale

Optica Publishing Group (2010) sotha3

Authors:

PA Shields, C Chan, N Read, DWE Allsopp, RA Taylor
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Effects of surface recombination on exciton dynamics in GaN nanorods

Journal of Nanoelectronics and Optoelectronics 4:3 (2009) 307-311

Authors:

YS Park, TW Kang, H Im, SK Lee, YH Cho, CM Park, MS Han, RA Taylor

Abstract:

We have investigated the optical properties of GaN nanorods with different diameters by microphotoluminescence (PL) and time-resolved PL measurements grown on (111) Si substrates by using radio-frequency plasma-assisted molecular-beam epitaxy. In order to confirm the formation of the GaN nanorods and their physical dimension, we employed high resolution scanning electron microscopy. As the diameters of the nanorods decreased, the donor bound exciton (D 0X) emission, which is mainly observed at low temperature for samples with larger diameters, rapidly quenched compared with the free exciton (FX). The activation energy of the FX for GaN nanorods with different diameters was also evaluated. The decay times are a few tens of ps for both the D0X and the FX transitions. The overall decay times decrease linearly with decreasing average diameter of the nanorods. Time-resolved PL studies show that surface recombination is dominant in determining the excitonic dynamics. Copyright © 2009 American Scientific Publishers All rights reserved.
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