Browsing Physics (Theses and Dissertations) by Title
Now showing items 398-411 of 411
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Ultrafast non-linear optics for telecommunication applications
(Trinity College (Dublin, Ireland). School of Physics, 2003)The aim of the research done for this thesis was to characterise the properties of a fibre laser producing ultrashort pulses at the telecommunication wavelength of 1550nm. We also measured the nonlinear optical properties ... -
Ultrafast Optical Nonlinearity of Liquid Phase Exfoliated Pdse2 Nanosheets.
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)In recent years, the study of condensed matter and optical physics has resulted in increasing technological progress, and this study may be credited with a significant portion of current scientific research and technical ... -
Ultrafast spectroscopy of DNA binding systems
(Trinity College (Dublin, Ireland). School of Physics, 2004)Ultrafast transient spectroscopy was used to investigate the properties of various systems which bind to DNA. Visible and IR pump and probe was employed to elucidate excited state process of the DNA binding complexes. Ultra ... -
Understanding DNA dispersed single-walled carbon nanotube systems
(Trinity College (Dublin, Ireland). School of Physics, 2008)HiPCO Single-walled carbon nanotubes (SWNTs) have been dispersed in water using a variety of different nucleic acids. An extensive study of the factors controlling the quality of the DNA-SWNT dispersions was carried out, ... -
Utilising Chromium-Based p-Type Transparent Conducting Oxides in Photovoltaic Devices
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)This thesis deals with the growth of modern, highly performing p-type transparent conducting oxides and their utilisation in two types of photovoltaic devices. X-ray spectroscopic techniques are used to understand the ... -
Variation of the electronic functionality of self-seeded germanium nanowires through synthesis determined core-shell interface states
(Trinity College (Dublin, Ireland). School of Physics, 2015)Bottom up grown germanium nanowires may have an important role to play in future electronic devices. While the electrical properties of nanowires grown using a metallic seed as a catalyst have been extensively reported we ... -
Viscoelastic Polymer Nanocomposites for Strain Sensing Applications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)Strain sensors are a technology that have developed in parallel with the major milestones in material science over the last century. Most recently, the field of 2D materials has proven to have found a wide range of ... -
Visible light scattering from micron scale silicon nitride structures
(Trinity College (Dublin, Ireland). School of Physics, 2012)Light scattering from complex and irregular shapes is responsible for many optical effects in nature. Butterfly wings change colour when viewed from different angles, due to a complex nanoscale scattering structure. Ice ... -
The winds of low-mass stars and solar-wind evolution
(Trinity College Dublin. School of Physics. Discipline of Physics, 2020)Stellar winds affect the evolution of stars (as well as impacting the planets orbiting these stars) through the removal of angular momentum and mass over time. This process changes the rotation rate of the host star, which ... -
Working Principle of Tunable PlasmonicReflect-Array Metasurfaces
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)This thesis will explore the way in which plasmonic metasurfaces, hosting nano-scale metallic resonator elements, can be used as beam-steering devices. We will propose our own devices that will demonstrate anomalous ... -
X-ray and radio diagnostics of accelerated electrons in solar active regions
(Trinity College (Dublin, Ireland). School of Physics, 2015) -
X-ray Photoelectron Spectroscopy of Novel Ternary Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)In this thesis the best synthesis conditions and compositional dependency of optoelectronic properties for novel ternary n-type amorphous Zinc Tin oxide (a-ZTO) and p-type nanocrystalline CuxCrO2 Transparent Conducting ... -
X-ray spectroscopic studies of the electronic structure of chromium based p-type transparent conducting oxides
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)In this thesis the electronic, optical, electrical, and mechanical properties of two p-type transparent conducting oxides will be explored, primarily by spectroscopic techniques. The initial chapters outline how the ... -
Young brown dwarfs and their environments : testing star and planet formation
(Trinity College (Dublin, Ireland). School of Physics, 2014)This thesis presents a new contribution to our understanding of the formation of brown dwarfs. From a description of their discovery, to an analysis of their disks and photospheres, it sheds new light on the conditions ...
