Browsing School of Physics by Title
Now showing items 61-80 of 2105
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Amorphous 2D-Nanoplatelets of Red Phosphorus Obtained by Liquid-Phase Exfoliation Yield High Areal Capacity Na-Ion Battery Anodes
(2023)The development of sodium ion batteries will require high-performance elec-trodes with very large areal capacity and reasonable rate performance. Although red phosphorus is a very promising electrode material, it has not ... -
Amplified spontaneous emission and optical gain spectra from stilbenoid and phenylene vinylene derivative model compounds
(1999)We report single-pass optical gain measurement in polystyrene! waveguides doped with stilbenoid and phenylene vinylene derivative model compounds under picosecond excitation. Using a wavelength dependent model of amplified ... -
Amplified spontaneous emission from a microtube cavity with whispering gallery modes
(2007)We present a detailed study of the photonic modes in microtube cavity of ~ 7-8 ?m outer diameter that can act as micron-scale optical cylindrical resonator. We demonstrate a new route to the fabrication of individual ... -
Amplitude coda of classical waves in disordered media
(2002)The propagation of classical waves in the presence of a disordered medium is studied. We consider wave pulses containing a broad range of frequencies in terms of the configurationally averaged Green function of the system. ... -
Amplitude-mode dynamics of polariton condensates
(2011)We study the stability of collective amplitude excitations in nonequilibrium polariton condensates. These excitations correspond to renormalized upper polaritons and to the collective amplitude modes of atomic gases and ... -
An electron paramagnetic resonance study of carbon based electronic materials
(Trinity College (Dublin, Ireland). School of Physics, 2000)Electron paramagnetic resonance (EPR) measurements have been made on films of hydrogenated amorphous carbon (a-C: H) and ion implanted 6H-SiC. We examine several sets of a-C: H films. The first and second sets of films ... -
An experimental investigation into the conversion of optical spin to orbital angular momentum using internal conical diffraction
(Trinity College (Dublin, Ireland). School of Physics, 2010)Internal conical refraction (ICR) transforms a ray incident upon the optic axis of a biaxial crystal into a cone of light within the medium and a hollow cylinder of light upon exiting. If the incident ray is circularly ... -
An experimental investigation of metal phthalocyanine-germanium interfaces
(Trinity College (Dublin, Ireland). School of Physics, 2009)Hybrid organic-inorganic devices present interesting possibilities for the growing field of organic semiconductors. The interface within these devices plays an im portant role in their performance, and as they decrease in ... -
An experimental investigation of tunable laser diodes based on multiple etched slots
(Trinity College (Dublin, Ireland). School of Physics, 2010)Widely tunable semiconductor lasers will play a critical part in future technologies. Tunable lasers are rapidly replacing fixed wavelength lasers in dense wavelength division multiplexing (DWDM) optical communications. ... -
An investigation into the effects of magnetic fields on biological cell processes
(Trinity College (Dublin, Ireland). School of Physics, 2011)The application of external magnetic fields to biological cells has received the attention of many researchers in recent decades and there have been countless reports of effects on a myriad of cellular processes. Despite ... -
An X-ray search for active cores in Local Group galaxies
(Trinity College (Dublin, Ireland). School of Physics, 2000)The nuclei of galaxies are sometimes sites of very energetic process, resulting in high levels of electromagnetic radiation being emitted. Such active galactic nuclei (AGNs) are thought to be powered by accretion of mass ... -
Analysis of liquid metal foams through X-ray radioscopy and microgravity experiments
(2014)Complex liquid structures such as metallic foams were produced in a furnace that allowed in situ X-ray monitoring of the evolution of the structure and distribution of the liquid in the foam. The experiments were carried ... -
Analysis of slot characteristics in single mode semiconductor lasers using the 2D scattering matrix method
(IEEE, 2006)We use the two-dimensional (2-D) scattering matrix method (SMM) to analyze the slot characteristics in slotted single-mode semiconductor lasers and compare the results with those calculated by the one-dimensional transfer ... -
Analysis of the conditional mutual information in ballistic and diffusive non-equilibrium steady-states
(2020)The conditional mutual information (CMI) ℐ(A:C|B) quantifies the amount of correlations shared between A and C given B. It therefore functions as a more general quantifier of bipartite correlations in multipartite scenarios, ... -
Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography
(2021)Foam-forming has in the past predominantly been used to create two-dimensional sheet-like fibrous materials. Allowing the foam to drain freely and decay under gravity, rather than applying a vacuum to remove it rapidly, ... -
Analyzing refractive index changes and differential bending in microcantilever arrays
(2008)A new microcantilever array design is investigated comprising eight flexible microcantilevers introducing two solid bars, enabling to subtract contributions from differences in refractive index in an optical laser read out ... -
Andreev reflection in two-dimensional topological insulators with either conserved or broken time-reversal symmetry
(2012)We investigate Andreev reflection in two-dimensional heterojunctions formed by a superconductor in contact with a topological insulator ribbon either possessing or breaking time-reversal symmetry. Both classes of topological ...