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Now showing items 1061-1070 of 2111
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 ...
Double pulse ultrafast laser ablation of nickel in vacuum
(2009)
We have studied ultrafast laser ablation of nickel using a pair of identical 250 fs 527 nm laser
pulses separated by 1 to 1000 ps. Scanning white light interferometry was used to measure the
ablated volume, and an ion ...
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 ...
Torque in nested Halbach cylinders
(IEEE, 1999)
Permanent magnet variable flux sources are
produced by rotating two nested N-segment, permanent
magnet, Halbach cylinders. Torque is primarily an end
effect, determined by field non-uniformities due to the fmite
length ...
Stability of Mn2RuxGa-based multilayer stacks
(2022)
Perpendicular heterostructures based on a ferrimagnetic Mn2RuxGa (MRG) layer and a ferromagnetic Co/Pt multilayer were examined to understand the effects of different spacer layers (V, Mo, Hf, HfOx and TiN) on the interfaces ...
Spin transport properties of triarylamine-based nanowires
(2014)
Triarylamine-derivatives can self-assemble upon light irradiation in one-dimensional nanowires with remarkable hole transport properties. We use a combination of density functional theory and Monte Carlo simulations to ...
Exchange-driven all-optical magnetic switching in compensated 3d ferrimagnets
(2020)
Understanding how a single laser pulse can toggle magnetization in a compensated 3d ferrimagnet is a critical
problem in ultrafast magnetism. To resolve it, we test single-shot all-optical switching of magnetization in
Mn ...
Structural distortions and model Hamiltonian parameters: From LSDA to a tight-binding description of LaMn O3
(American Physical Society, 2007)
The physics of manganites is often described within an effective two-band tight-binding TB model for the
Mn eg electrons, which apart from the kinetic energy includes also a local ?Hund?s rule? coupling to the t2g
core ...
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 ...
New Technologies for Ultra-low Dose-rate Imaging in the STEM
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)
Electron microscopy arose from the need to image materials beyond the resolution optical microscopes could achieve. Though taking many years and technological advancements, the modern scanning transmission electron microscope ...