Browsing School of Physics by Title
Now showing items 934-953 of 2105
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Investigation of copper chloride for photonics applications
(Trinity College (Dublin, Ireland). School of Physics, 2011)Wide band gap semiconductors have found multiple applications. Being light emitters in the range of blue and UV, materials like GaN or ZnO have been applied to highly efficient blue light emitting diodes, and increasingly ... -
Investigation of different synthetic routes to and structure-property relationships of poly(m-phenylenevinylene-co-2,5-dioctyloxy-p-phenylenevinylene)
(2003)The synthesis of poly(m-phenylenevinylene-co-2,5-dioctyloxy-p-phenylenevinylene) by Horner?Emmons and Wittig condensation polymerisation in three different solvents is described. The chemical and optical properties of the ... -
Investigation of electronic structure and optical properties of organic molecular semiconductor materials by X-ray spectroscopies
(Trinity College (Dublin, Ireland). School of Physics, 2009)The electronic structure of thin films of several members of the metal phthalocyanine (MPc) and metal chelate families of organic molecular semiconductors have been studied using resonant soft x-ray emission spectroscopy, ... -
Investigation of low voltage Fabry-Perot modulators for optical interconnect applications
(Trinity College (Dublin, Ireland). School of Physics, 2001)Optical interconnect technology is one of the proposed solutions to the fast approaching communication bottleneck in electronic digital systems, arising from the bandwidth limitations of electrical interconnects. Optical ... -
Investigation of nanosecond and femtosecond pulsed laser deposition and application of some metal nanoparticle films
(Trinity College (Dublin, Ireland). School of Physics, 2012)Pulsed laser deposition (PLD) is a convenient and flexible technique which can be applied to all elemental and compound solids. In conventional PLD a nanosecond (ns) laser is used to ablate the surface of a solid target ... -
Investigation of near-infrared laser diodes for application in space-based spectroscopic gas sensing
(Trinity College (Dublin, Ireland). School of Physics, 2007)The availability of numerous semiconductor diode lasers that provide wavelength tuneable, high output power, single frequency emission in the near infrared region of the spectrum (0.7μm - 2.5μm) provides researchers with ... -
Investigation of optimum wavelength converter based on nonlinear polarization rotation in a bulk SOA
(2007)This work is focused on understanding and optimising the physical mechanisms responsible for wavelength conversion based on cross-polarisation modulation (XPolM) in a bulk semiconductor optical amplifier. A comparison is ... -
Investigation of organic / ferromagnet interface and magnetoresistive characteristics of small molecule organic semiconductors
(Trinity College (Dublin, Ireland). School of Physics, 2013)Spin injection, transport and dynamics in organic semiconductors are of growing interest as the field of organic spin electronics begins to take shape during the last decade. This new field of research aims to manipulate ... -
Investigation of polarization dependent gain in a bulk SOA
(2007)The polarization dependence of the gain dynamics in a bulk semiconductor optical amplifier is examined using two experimental setups. The first experimental investigation is based on four-wave mixing. Using a low-pass ... -
Investigation of the physical mechanisms of shear-force imaging
(American Institute of Physics, 1996)It is shown that shear-force imaging, as is commonly used for distance regulation in scanning near-field optical microscopy, is not a reliable technique for accurate topographic measurements. This is because different ... -
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 ... -
Investigation on the origin of the magnetic moment of BiFeO3 thin films by advanced x-ray characterizations
(2006)Single phase 001 -oriented BiFeO 3 BFO thin films grown by pulsed laser deposition can only be obtained in a narrow window of deposition pressure and temperature and have a low magnetic moment. Out of ... -
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 ... -
IrMn as exchange-biasing material in systems with perpendicular magnetic anisotropy
(American Institute of Physics, 2005)Contact between a Co/Pt multilayer and an IrMn film leads to perpendicular exchange bias. The exchange bias field does not depend on the degree of (111) film texture and for Co/Pt multilayers with IrMn at the bottom it can ... -
Is the activity level of HD80606 influenced by its eccentric planet?
(2016)Aims. Several studies suggest that the activity level of a planet-host star can be influenced by the presence of a close-by orbiting planet. Moreover, the interaction mechanisms that have been proposed, magnetic interaction ... -
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 ...