Physics (Theses and Dissertations): Recent submissions
Now showing items 81-100 of 458
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Athermalisation and Characterisation of High-OrderSurface Grating Lasers for Optical Communications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The semiconductor laser allows for the vast quantities of data that are transmitted over optical fibre each day. A simple device has transformed our lives. This transformation will continue in the coming decade where ... -
The Growth and Characterisation of Mn2Au Thin Films and Heterostructures
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)In this thesis, Mn2Au thin films and heterostructures are grown via molecular beam epitaxy. Mn2Au thin films are investigated on MgO (001) and Al2O3 (1102) substrates, and on Pt (111) seed layer grown on an Al2O3 (0001) ... -
Interactions of Plasmonic and Dielectric Structures with 2D Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)Three separate systems of nanoparticles coupled to two-dimensional materials are studied. Each system is investigated both experimentally and numerically with FDTD simulations. The first system involves a nanoparticle-on-mirror ... -
Heat Transfer in Open Quantum Systems
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)In most situations of practical interest, quantum systems are not isolated from their surroundings but are interacting with an environment. The importance of such situations has been highlighted, for example, in the fields ... -
Thermal transport in thin films and across interfaces of dissimilar phase materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)As electronic and photonic devices steadily become more miniaturised and integrated the power density and heat flux that is required is increasing rapidly. Electronic and photonic circuits are now being integrated on the ... -
The Design, Characterisation and Athermalisation of Vernier Widely Tunable Semiconductor Lasers
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The early 21st century has seen a surge in demand for communications technologies, particularly with the internet having become a near essential utility in recent years. The rise of high-resolution video streaming, among ... -
Piezoresistive Properties of 2D based Nanocomposites for Strain Sensing Applications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The superlative piezoresistive properties of nanomaterials and their composites have attracted great interest in the area of strain sensing. The field has grown exponentially over the past decade, benefiting from the ... -
An Investigation into the Accretion Processes of Young Stellar Objects
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The way in which young stars form is complex and fascinating, and is anything but a smooth, continuous process. Studying their dramatic, and sometimes violent, early years of accreting and ejecting material is vital in ... -
Tuneable plasmonic metasurfacesfor on-chip beam steering applications using vanadium dioxide
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)For centuries, optical components were created using bulk components of various refractive indexes where light accumulates phase over a path much longer than its wavelength. With the advent of nanofabrication techniques, ... -
Inverse Problems in Disordered Systems
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)It is a simple Quantum Mechanics problem to find the electronic conductance of a device by directly solving the Schrodinger Equation. Obviously, this is the case if and only if the underlying Hamiltonian is known, i.e., ... -
Post-fabrication tuning of Hybrid Plasmonic Nanostructures with VO2
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The development of hybrid plasmonic nanostructures and metamaterials to control electromagnetic radiation on the nanoscale has been at the centre of scientific research for the past few decades. Utilising the surface plasmon ... -
New Methods of Studying Young Stellar Objects Using Radio Interferometry
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)While most studies of star formation are based on infrared or optical observations, radio astronomy has also proven very useful in the study of this process. This is seen for example in the detection of free-free emission ... -
Controlling the Properties of a-ZTO and a-IGZO via Low Temperature Annealing and Novel Layered Structures
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)This thesis deals with the broader implications of amorphous ZnSnO (a-ZTO) growth via two synthesis methods, examining the in-situ resistivity monitoring approach to optimising a low-annealing temperature <300 ?C and ... -
Study of Kerr Soliton Microcombs in Optical Microresonators
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Microresonator-based Kerr optical frequency combs exhibit a spectrum of discrete and equally spaced frequency lines. The comb source is a precise frequency ruler to measure time and distance to extraordinary precision and ... -
Electronic transport studies of highly-polarized compensated ferrimagnetic thin films: Mn2RuxGa
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Abstract Modern day information technologies not only rely on miniaturization and densification of data processing and data storage, but also on fast data transmitters and receivers. Current CMOS based technologies are ... -
Developing a Next Generation Readout System for Microwave Kinetic Inductance Detectors
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Microwave Kinetic Inductance Detectors (MKIDs) are photon detectors based on superconducting resonators, capable of detecting single photons with inherent energy resolution and μs time resolution, while also allowing ... -
Compositional and Structural Characterisation of Polymer Photovoltaic Devices
Organic materials have enormous relevance in material science and have many advantages over materials such as metals, ceramics and glass due to their physical and mechanical properties. They offer a viable alternative to ... -
Modelling, development and characterisation of Microwave Kinetic Inductance Detectors for optical astronomy
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)In this thesis I report on the research I carried out on the topic of Microwave Kinetic Inductance Detectors (MKIDs) over the last four years. After an introduction chapter and a literature review on MKIDs, Chapter 3 ... -
Magnetic investigations of Mn-based and Mn-free potential half metals
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)This thesis is concerned with an unusual category of magnetically ordered material, the zero moments ferrimagnetic half metal, which has potential for applications in thin film memory and logic devices. The materials are ... -
Magnetic field effects on water and aqueous solutions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Claims of magnetic field effects on water and their potential use in a microfluidic channel are explored. The pendant drop method is used to measure the surface tension, which is calculated from the shape of the drop. The ...
