Browsing School of Physics by Title
Now showing items 41-60 of 2105
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An adjustable linear Halbach array
(Elsevier, 2012)The linear Halbach array is a well known planar magnetic structure capable, in the idealized case, of generating a one-sided magnetic field. We show that such a field can be created from an array of uniformly magnetized ... -
Ag colloids and arrays for plasmonic non-radiative energy transfer from quantum dots to a quantum well
(2017)Non-radiative energy transfer (NRET) can be an efficient process of benefit to many applications including photovoltaics, sensors, light emitting diodes and photodetectors. Combining the remarkable optical properties of ... -
Ag nanoparticle decorated graphene oxide: Fluorescence quenching and surface enhanced raman scattering
(2016)The emission and Raman scattering properties of three dyes, Rhodamine 6G (R6G), Rhodamine B (RhB) and Sulforhodamine 101 (SR101), were characterised on graphene oxide (GO) and Ag nanoparticle (NP) decorated graphene oxide ... -
Ag-nanowire films coated with ZnO nanoparticles as a transparent electrode for solar cell
(2011)We demonstrate that solution-processible silver-nanowire films coated with zinc-oxide-nanoparticles (ZnO-NPs) can be used as transparent electrodes in organic photovoltaic devices. The ZnO-NP coating acts as electron ... -
Algorithm for the construction of self-energies for electronic transport calculations based on singularity elimination and singular value decomposition
(2008)We present a complete prescription for the numerical calculation of surface Green’s functions and self- energies of semi-infinite quasi-one-dimensional systems. Our work extends previous results generating a robust algorithm ... -
[Alii] in the ultraviolet spectrum of the symbiotic star RR Telescopii
(Blackwell, 1999)An inspection of a GHRS/HST spectrum of the symbiotic star RR Telescopii reveals the presence of the [Alii] 3s^2 ^1S - 3s3p ^3P_2 line at a vacuum wavelength of 2661.06+/-0.08?, 8.89+/-0.08? away from the Alii] 3s^2 ^1S - ... -
Alkynyl substituted phthalocyanine derivatives as targets for optical limiting
(2003)One of the key issues in the development of efficient optical limiters is the search for appropriate materials with improved nonlinear absorption. Phthalocyanine materials are among the most promising nonlinear absorbers ... -
All-optical pulse processing for advanced photonic communication system
(IEEE, 2008)This paper investigates the use of a Two-Photon Absorption photodetector for high speed processing of ultrashort optical pulses in advanced photonic communication systems. Specifically the paper describes how the Two-Photon ... -
All-optical sampling based on two-photon absorption in a semiconductor microcavity for high-speed OTDM
(SPIE, 2005)Future high-speed optical communications networks operating at data rates in excess of 100Gbit/s per channel will require a sensitive and ultrafast technique for precise optical signal monitoring.1 The standard way ... -
All-optical synchronization and multiplication of the frequency of mode-locked signals
(IEEE, 1993)We report all-optical synchronized multiplication by rational fractions of the modulation frequency of optical signals in self-pulsing two-section semiconductor laser diodes. The effect is based on the overlap of harmonics ... -
All-printed capacitors from graphene-BN-graphene nanosheet heterostructures
(2016)This work aims to develop methodologies to print pinhole-free, vertically stacked heterostructures by sequential deposition of conductive graphene and dielectric h-BN nanosheet networks. We achieve this using a combination ... -
All-printed dielectric capacitors from high permittivity, liquid-exfoliated BiOCl nanosheets
(2020)Printed networks of insulating 2D materials are promising for dielectric applications in printed electronic devices. However, this work has not really progressed beyond networks of BN nanosheets displaying dielectric ... -
ALMA Observations of Non-uniform Dust Mass-loss in the Inner Circumstellar Environment of the Red Supergiant VY CMa
(2015)The processes leading to dust formation and the subsequent role it plays in driving mass loss in cool evolved stars is an area of intense study. Here we present high resolution ALMA Science Verification data of the continuum ... -
ALMA sub-mm maser and dust distribution of VY Canis Majoris
(2014)Cool, evolved stars have copious, enriched winds. Observations have so far not fully constrained models for the shaping and acceleration of these winds. We need to understand the dynamics better, from the pulsating stellar ... -
Alternating and direct current characterization and photoinduced absorption studies of modified conjugated polymer thin films
(2004)Control of interchain separation enables the optical properties of polymer thin films to be altered. We present a thin film preparation technique that increases the free volume fraction in spin coated polymer thin films ... -
Alternating and direct current characterization and photoinduced absorption studies of modified conjugated polymer thin films
(Journal of Applied Physics, 2004)Control of interchain separation enables the optical properties of polymer thin films to be altered. We present a thin film preparation technique that increases the free volume fraction in spin coated polymer thin films ... -
An alternative fluorine precursor for the synthesis of SnO2:F by spray pyrolysis
(2012)An alternative, non-toxic precursor was employed for the synthesis of SnO2:F transparent conducting oxide. The performance of benzenesulfonyl fluoride (BSF) as F source for spray pyrolysis was investigated. Its decomposition ... -
Aluminium doped Zn1−xMgxO A transparent conducting oxide with tunable optical and electrical properties
(2012)A ternary mixed oxide Zn1 xMgxO has been doped with aluminium to create a range of transparent conducting oxides with tunable refractive index as well as work function. Conductive material was synthesised up to a magnesium ...