Browsing Physics (Theses and Dissertations) by Title
Now showing items 397-410 of 410
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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 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, ... -
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 ... -
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 ... -
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 ... -
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 ...