Quantum Optoelectronics

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Optical properties of bulk‐like GaN nanorods grown on Si(111) substrates by rf‐plasma assisted molecular beam epitaxy

physica status solidi (c) Wiley 7:7‐8 (2010) 2211-2213

Authors:

Young S Park, TW Kang, Hyunsik Im, Mark J Holmes, Robert A Taylor
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Strongly coupled single quantum dot in a photonic crystal waveguide cavity

(2010)

Authors:

FSF Brossard, XL Xu, DA Williams, M Hadjipanayi, M Hopkinson, X Wang, RA Taylor
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Quantum confined Stark effect of InGaN/GaN multi-quantum disks grown on top of GaN nanorods.

Nanotechnology 21:11 (2010) 115401

Authors:

Young S Park, Mark J Holmes, Tae W Kang, Robert A Taylor

Abstract:

We have investigated, using micro-photoluminescence, the quantum confined Stark effect in an In(x)Ga(1-x)N/GaN multi-quantum disk structure at the tip of a single GaN nanorod. A strong and sharp emission line from the In(x)Ga(1-x)N/GaN quantum disks near 3.26 eV was observed. The peak energy of the emission line was observed to blue-shift with increasing excitation power, indicating a quantum confined Stark effect. Furthermore, both the blue-shift and the intensity of the emission saturate with increasing excitation power. The temperature-dependence of the 3.26 eV emission line has also been investigated.
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Quantum confined Stark effect of InGaN/GaN multi-quantum disks grown on top of GaN nanorods

Nanotechnology 21:11 (2010)

Authors:

YS Park, MJ Holmes, TW Kang, RA Taylor

Abstract:

We have investigated, using micro-photoluminescence, the quantum confined Stark effect in an InxGa1 - xN/GaN multi-quantum disk structure at the tip of a single GaN nanorod. A strong and sharp emission line from the InxGa1 - xN/GaN quantum disks near 3.26eV was observed. The peak energy of the emission line was observed to blue-shift with increasing excitation power, indicating a quantum confined Stark effect. Furthermore, both the blue-shift and the intensity of the emission saturate with increasing excitation power. The temperature-dependence of the 3.26eV emission line has also been investigated. © 2010 IOP Publishing Ltd.
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Cavity Enhancement of single quantum dot emission in the blue

Nanoscale Research Letters 5:3 (2010) 608-612

Authors:

RA Taylor, AF Jarjour, DP Collins, MJ Holmes, RA Oliver, MJ Kappers, CJ Humphreys

Abstract:

Cavity-enhanced single-photon emission in the blue spectral region was measured from single InGaN/GaN quantum dots. The low-Q microcavities used were characterized using micro-reflectance spectroscopy where the source was the enhanced blue output from a photonic crystal fibre. Micro-photoluminescence was observed from several cavities and found to be ~10 times stronger than typical InGaN quantum dot emission without a cavity. The measurements were performed using non-linear excitation spectroscopy in order to suppress the background emission from the underlying wetting layer. © The Author(s) 2009.
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