Browsing Physics (Theses and Dissertations) by Title
Now showing items 159-178 of 420
-
Investigation of Polymer-based Responsive Photonic Structures Fabricated by Two Photon Polymerisation
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)In this thesis, various 2D and 3D submicron polymer-based photonic structures are investigated for structural colour generation. 2D diffractive gratings have been designed and theoretically investigated by using ... -
Investigation of transport through interfacial barriers between metals and semiconductors
(Trinity College (Dublin, Ireland). School of Physics, 2009)Electrical spin injection from a ferromagnetic metal source into a semiconductor can only take place through an interfacial barrier (Rashba, Phys. Rev. B 62, R16267 and Phys. Rev. B 68, 241310). This thesis presents a study ... -
Investigations in real-time confocal microscopy
(Trinity College (Dublin, Ireland). School of Physics, 2002)This thesis is a study of imaging in real-time confocal imaging systems. The particular instrument examined is the direct-view microscope (DVM), an instrument which allows real-time confocal imaging through the use of an ... -
Ion outflow and soft X-ray radiation from a micro capillary discharge source and laser produced plasma
(Trinity College (Dublin, Ireland). School of Physics, 2002)This thesis concerns itself with the study of pulsed plasma sources. The plasma is produced either in an electrical discharge or by a laser pulse. The plasma is generated on a nanosecond time scale, after which it evolves ... -
Issues relating to the application of monolithic tuneable laser diodes to multi-species gas detection
(Trinity College (Dublin, Ireland). School of Physics, 2005)Tuneable Diode Laser Absorption Spectroscopy (TDLAS) technology for gas sensing has had reliance on, and has benefited from, devices developed for the optical communications sector, namely distributed feedback laser diodes. ... -
The Jacobi-Legendre framework for Machine Learning in Materials Investigation and Discovery
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)Machine-learning models have rapidly become fundamental tools in the study of materials properties. In the past few years there has been a surge of interest in the construction of new models and descriptors to accelerate ... -
Kinematic properties of globally-propagating waves in the solar corona
(Trinity College (Dublin, Ireland). School of Physics, 2012)Globally-propagating bright fronts in the solar corona are a poorly understood phenomena despite almost 15 years of research. Here, the kinematics and morphology of these disturbances are studied using Extreme UltraViolet ... -
Laser-induced failure modes in plasmonic thin films
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)In order for the areal density of magnetic hard-drives to continue increasing, it is necessary to improve upon current recording technologies. The proposed next-generation magnetic recording process, heat-assisted magnetic ... -
Linear and nonlinear optical characterisation of self assembled nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2012) -
Linear and nonlinear optical characterisation of silicon nanowire structures
(Trinity College (Dublin, Ireland). School of Physics, 2008)The morphological and optical properties of various silicon nanowire structures were investigated. Photoluminescence was produced by all of the nanostructures and was attributed to a variety of different mechanisms. Optical ... -
Linear and nonlinear optical properties of low-dimensional structures on vicinal silicon (111) surfaces
(Trinity College (Dublin, Ireland). School of Physics, 2008) -
Liquid phase exfoliation and dispersion of two dimensional materials
(Trinity College (Dublin, Ireland). School of Physics, 2014)Over the last few years, it has become clear that due to their high surface area and novel properties, two dimensional materials will be extremely useful both for fundamental studies and for a range of applications. Previous ... -
Liquid Phase Exfoliation of 2D Materials under Ambient Conditions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)A technique developed by the Coleman group in 2008 called liquid phase exfoliation (LPE) has been shown to be effective for the delamination of any material exhibiting a layered structure. Molybdenum dioxide ... -
Liquid phase exfoliation of two dimensional crystals
(Trinity College (Dublin, Ireland). School of Physics, 2013) -
Local investigations of switchable rotaxane molecules at interfaces using atomic force microscopy
(Trinity College (Dublin, Ireland). School of Physics, 2008)Rotaxane molecules (interlocked molecules consisting of two parts bonded mechanically) have an inherent multi-stability. The relative positions of the submolecular components can be altered through external stimuli, a ... -
Localised surface plasmon mediated energy transfer in quantum dot systems
(Trinity College (Dublin, Ireland). School of Physics, 2015)Nonradiative energy transfer to metal nanoparticles (NPs) is a technique used for optical- based distance measurements which is often implemented in sensing. Both Forster resonant energy transfer (FRET) and nanometal surface ... -
Localized basis approach to many-body effects and dielectric response
(Trinity College (Dublin, Ireland). School of Physics, 2001)This thesis is a study of the optical and dielectric properties of semiconductors and insulators, and of the way in which these properties provide insight into the microscopic response of the interacting system. The central ... -
LOFAR Observations of Shocks in the Solar Corona
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)The Sun can produce large-scale energetic events such as solar flares and coronal mass ejections, which can excite shock waves that propagate from the low solar atmosphere into interplanetary space. Such shocks can result ... -
LOFAR tied-array imaging and spectroscopy of solar radio bursts
(Trinity College (Dublin, Ireland). School of Physics, 2016)The Sun is the source of the most powerful explosions in the solar system such as solar ares and coronal mass ejections (CMEs). These explosions can occur up to several times per day and they release up to 1032 ergs (1025 ... -
Low Frequency Observations of the Solar Corona using LOFAR
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)The Sun is a highly dynamic, active star, dictated by the evolution of its magnetic fields, which transition from periods of maximum activity to periods of minimum activity over an 11-year cycle. During solar maximum the ...
