Browsing Physics (Scholarly Publications) by Title
Now showing items 21-40 of 1694
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Absorption and photoluminescence study of CdS quantum dots: the role of host matrix and nanocrystal size and density
(Materials Research Society, 1999) -
Acceptance angle influence on optimum incident spot size for high-finesse microcavity two-photon absorption photodetectors
(2009)The influence of the limited acceptance angle of a high-finesse microcavity two-photon absorption photodetector on its response has been investigated. It is shown that the limited acceptance angle of the microcavity ... -
Activation behaviour and dielectric relaxation in polyvinyl alcohol and multiwall carbon nanotube composite films
(2011)The dc and ac electrical transport property of Polyvinyl Alcohol-Multiwall Carbon Nanotubes (PVA-MWNT) composites has been investigated within a temperature range 77?T?300K and in the frequency range 20Hz to 1MHz. The ... -
Additive Manufacturing of Li-Ion Batteries: A Comparative Study between Electrode Fabrication Processes
(2023)Additive manufacturing strategies are gaining more importance in the context of lithium-ion batteries. The rapid prototyping, reduced waste and complex 3D structures achievable are powerful and attractive tools that are ... -
Additive-free MXene inks and direct printing of micro-supercapacitors
(2019)Direct printing of functional inks is critical for applications in diverse areas including elec-trochemical energy storage, smart electronics and healthcare. However, the available prin-table ink formulations are far from ... -
Adhesion interaction between atomically defined tip and sample
(American Physical Society, 1998)We have measured forces between an atomically defined W(111) tip and an Au(111) sample in ultrahigh vacuum at 150 K. The W tips are manipulated and characterized on an atomic scale both before and after sample approach by ... -
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 ...