Browsing School of Physics by Title
Now showing items 711-730 of 2099
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Galaxy clusters, voids and elliptical galaxies using the ROSAT PSPC
(Trinity College (Dublin, Ireland). School of Physics, 2003)The ROSAT data archive contains of the order of 100,000 sources observed by the ROSAT PSPC (Position Sensitive Proportional Counter). For many sources detected with the ROSAT PSPC there is not a sufficient number of photons ... -
Gamma Ray Bursts : probing burst environments in high redshift galaxies
(Trinity College (Dublin, Ireland). School of Physics, 2008)First discovered in the late 1960s, Gamma Ray Bursts have remained something of a cosmic mystery for almost four decades. It has only been quite recently that the nature of these phenomena is beginning to be understood. ... -
GaN resonant cavity light-emitting diodes for plastic optical fibre applications
(2004)The optical designs of resonant GaN light-emitting diodes (LEDs) have been determined for maximum extraction efficiency into typical plastic optical fiber of numerical aperture 0.5. An optimum extraction efficiency of 3.9% ... -
Gas-phase interstitial modification of rare-earth intermetallics.
(IEEE, 1992)The gas-phase interstitial modification of rare-earth intermetallics is studied. Net reaction energies for nitrogen in Sm2Fe17 and Nd(Fe11Tl) are U 0=-57 kJ/mole and U0=-51 kJ/mole, respectively. The equilibrium nitrogen ... -
Gate controlled spin pumping at a quantum spin Hall edge
(2013)We propose a four-terminal device designed to manipulate by all electrical means the spin of a magnetic adatom positioned at the edge of a quantum spin Hall insulator. We show that an electrical gate, able to tune the ... -
General approach to the analysis of plasmonic structures using spectroscopic ellipsometry
(2013)In this article a route to analyze the full optical response of plasmonic structures is developed. First, the simple case of an anisotropic thin plasmonic layer supported on a transparent substrate is analyzed by ... -
A general strategy for hybrid thin film fabrication and transfer onto arbitrary substrates
(2014)The development of thin film-based structures/devices often requires thin films to be transferred onto arbitrary substrates/surfaces. Controllable and non-destructive transfer method, although highly desired, remains ... -
Generalizing solubility parameter theory to apply to one- and two-dimensional solutes and to incorporate dipolar interactions
(2013)Hildebrand and Hansen solubility parameters are commonly used to identify suitable solvents for the dispersion or dissolution of a range of solutes, from small molecules to graphene. This practice is based on a number of ... -
Generation of a radially polarized light beam using internal conical diffraction
(2011)Using a combination of internal conical diffraction and Mach-Zehnder interferometry we have theoretically and experimentally demonstrated an efficient new technique for the conversion of a linearly polarized Gaussian laser ... -
Generation of continuously tunable fractional optical orbital angular momentum using internal conical diffraction
(2010)When a left-circularly polarised Gaussian light beam, which has spin angular momentum (SAM) J sp = ? ? = 1 ? per photon, is incident along one of the optic axes of a slab of biaxial crystal it undergoes internal ... -
Generation of continuously tuneable fractional optical orbital angular momentum using internal conical diffraction
(2010)Abstract: When a left-circularly polarised Gaussian light beam, which has spin angular momentum (SAM) Jsp = ?? = 1? per photon, is incident along one of the optic axes of a slab of biaxial crystal it undergoes internal ... -
Generation, characterisation and solidification of crystalline microfoams
(Trinity College (Dublin, Ireland). School of Physics, 2008)This study is centered around the spontaneous ordering of equally sized microbubbles on top of a liquid pool, forming wet crystalline microfoams. This type of ordering was firstly observed by Bragg and Nye in 1947 and only ... -
Genetic algorithm optimization of high order surface etched grating tunable laser array
(2020)A genetic algorithm is developed with a view to optimizing surface-etched grating tunable lasers over a large optimization space comprised of several variables. Using this approach, a new iteration of slotted lasers arrays ... -
Geometric Constraints in the Growth of Nanotube Templated Polymer Monolayers
(2004)We present a simple and general model that describes the ordered assembly of polymer strands on nanotube surfaces. Energetically favorable coiling angles are identified based on geometric constraints that limit the maximum ... -
Giant energy product in nanostructured two-phase magnets
(American Physical Society, 1993)Exchange hardening of nanostructured two-phase systems composed of an aligned hard phase and a soft phase with high magnetization is investigated using an approach which yields analytic nucleation fields from the micromagnetic ... -
Giant magnetic moment in epitaxial Fe3O4 thin films on MgO (100)
(2008)Magnetization studies on well characterized epitaxial magnetite (Fe3O4) thin films grown on MgO(100) show that the ultrathin films (<5?nm thickness) are ferromagnetic and their magnetic moments are much greater than those ... -
Giant magnetoresistive effects in a single element magnetic thin film.
(American Physical Society, 1996)By exploiting the simplicity of a novel transport measurement on a ferromagnetic striped domain structure in a thin film of cobalt, we report the first direct observation of ferromagnetic domain wall scattering and what ... -
Giant Resistance Change across the Phase Transition in Spin-Crossover Molecules
(2012)The electronic origin of a large resistance change in nanoscale junctions incorporating spin-crossover molecules is demonstrated theoretically by using a combination of density functional theory and the nonequilibrium ... -
Giant spontaneous Hall effect in zero-moment Mn2Ru x Ga
(2015)Spin-dependent transport properties of Mn2Ru x Ga thin-films are studied as function of the Ru concentration and the substrate-induced strain. The large spontaneous Hall angle of 7.7% twenty times bigger than in other 3d ...
