Browsing School of Physics by Title
Now showing items 271-290 of 840
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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% ... -
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, 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 ... -
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 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 ... -
Growth and characterization of epitaxial Ti3GeC2 thin films on 4 H-SiC(0 0 0 1)
(2012)Epitaxial Ti3GeC2 thin films were deposited on 4? off-cut 4 H-SiC(0 0 0 1) using magnetron sputtering from high purity Ti, C, and Ge targets. Scanning electron microscopy and helium ion microscopy show that the Ti3GeC2 ... -
Growth and electrical characterisation of conjugated polymer nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2011)The field of conductive polymers is one in which there has been much interest in the last number of years. Two of the most common conductive polymers, polypyrrole and poly(p-phenylene vinylene) are investigated in the ... -
Growth and ordering of Ni(II) diphenylporphyrin monolayers on Ag(111) and Ag/Si(111) studied by STM and LEED
(2012)The room temperature self-assembly and ordering of (5,15-diphenylporphyrinato)nickel(II) (NiDPP) on the Ag(111) and Ag/Si(111)-(?3 ? ?3)R30? surfaces have been investigated using scanning tunnelling microscopy and low-energy ... -
The growth of high-crystalline quality M n 2 Au (110) thin films
(2022)Mn2Au is a bimetallic antiferromagnetic with an extraordinarily high Néel temperature of 1600 K. Mn2Au has also been found to demonstrate Néel-order spin–orbit torque, allowing for electrical switching of the antiferromagnetic ... -
Heat capacity of nichel sulfide and its semimetal-metal transition
(American Physical Society, 1974)Heat-capacity measurements have been made from 5 to 330 K on NiS which shows a nonmetal-metal transition at 265 K, and on Ni0.95S which is metallic at all temperatures. The low-temperature data yield electronic specific-heat ...