Sort by: Order: Results:

Now showing items 1-20 of 214

  • Picosecond degenerate four-wave mixing in organic materials 

    Maloney, Colette (Trinity College (Dublin, Ireland). School of Physics, 1986)
  • CrO2 : a general study 

    Barry, Amanda (Trinity College (Dublin, Ireland). School of Physics, 2000)
    The aims of this work were (i) to prepare chromium dioxide, CrO2, in thin film and powder form (ii) to study its magnetic, electronic and thermal properties and (iii) to introduce thin films of CrO2 into a multilayer device ...
  • Surface studies of magnetite (100) 

    Seoighe, Ciaran (Trinity College (Dublin, Ireland). School of Physics, 2000)
    The (100) surface of magnetite (Fe3 O4 ) has been studied using scanning tunneling microscopy (STM) in ultra high vacuum (UHV) with a view to establishing a test surface for spin polarised STM experiments. Two ...
  • The weakly coupled chiral Schwinger model on a finite lattice 

    Pinto, Carlos (Trinity College (Dublin, Ireland). School of Physics, 2000)
    The primary aim of this work is the development of a perturbative analysis of the phase structure of the lattice Schwinger model. A novel method for implementing this analysis is presented. It is shown analytically that ...
  • Supersymmetric noether currents and Seiberg-Witten theory 

    Iorio, Alfredo (Trinity College (Dublin, Ireland). School of Physics, 2000)
    This thesis has been devoted to the construction of the Noether supercharges for the Seiberg-Witten (SW) model. One of our most important results is the first complete and direct derivation of the SW version of the ...
  • Development and optimisation of optical interferometric techniques for surface metrology 

    Bowe, Brian (Trinity College (Dublin, Ireland). School of Physics, 2000)
    Optical surface metrology techniques offer many advantages over conventional methods. These include a greater sensitivity, improved lateral and vertical resolution, non-contact and full-field measurements and the fact that ...
  • An electron paramagnetic resonance study of carbon based electronic materials 

    Collins, Michael Peter (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 ...
  • Morphological influences on the excited state dynamics of conjugated polymers 

    Dalton, Alan Brian (Trinity College (Dublin, Ireland). School of Physics, 2000)
    A series of soluble phenylene vinylene copolymers have been prepared by four different methods. Two of these methods use the Wittig reaction in toluene and DMF, whereas the other two were prepared by the Horner reaction ...
  • Optimization techniques in elastic proton-proton collisions 

    Bates, Alan T. (Trinity College (Dublin, Ireland). School of Physics, 2000)
    The proton spin puzzle has intrigued experimentalists and theorists since the surprising result from the EMC experiment at CERN in 1988, which found a smaller than expected contribution to the spin of the proton from the ...
  • Curing of complex monomer systems: a spectroscopic and thermal analysis 

    Martin, Seán J. (Trinity College (Dublin, Ireland). School of Physics, 2001)
    This thesis describcs the development of a novel methodology, which uses the high resolution liquid nuclear magnetic resonance (NMR) spectroscopic technique to continuously monitor in real time the thermal and UV-photoinitiated ...
  • Preparation, characterisation and technological applications of half-metallic ferromagnetic oxides in ceramic and thin film form 

    Borges, Rui Pedro Nogueiro Gomes Morais (Trinity College (Dublin, Ireland). School of Physics, 2001)
    The aims of this study were: (i) to study the structural, magnetic and transport properties of ferromagnetic oxides (La0.7 Sr0.3)MnO3 and A2FeMoO6 (A=Ca, Sr, Ba) in polycrystalline and thin film form, (ii) to optimise the ...
  • Investigation of low voltage Fabry-Perot modulators for optical interconnect applications 

    Byrne, Declan James (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 ...
  • Simulations of foams and liquid surfaces 

    Bradley, Kevin Geoffrey (Trinity College (Dublin, Ireland). School of Physics, 2001)
    In this thesis, we combine physics and numerical methods to describe the basic properties of foams and liquid surfaces. In Part I, we provide a brief general introduction to the subject of foam physics, detailing what a ...
  • Mechanically alloyed Sm-Co hard magnetic materials 

    Gallagher, Kathleen (Trinity College (Dublin, Ireland). School of Physics, 2002)
    In the recent search for new high-temperature permanent magnet materials, research has concentrated on bulk Sm2Co17-type magnets. The usual approach to development of coercivity in bulk Sm-Co based materials is to prepare ...
  • Numerical and experimental investigation of a novel waveguide design for use in high power laser diode devices 

    Patchell, John A. (Trinity College (Dublin, Ireland). School of Physics, 2002)
    Because of their efficiency, small size and reliability high power laser diodes are used for numerous tasks, such as the pumping of solid state lasers, second harmonic generation and the pumping of rare earth fibre ...
  • Multiphoton processes in a series of designer organic materials 

    Brennan, Margaret Elizabeth (Trinity College (Dublin, Ireland). School of Physics, 2002)
    Multiphoton processes in a series of promising organic materials; an endohedral metallofullerene, La@C82, carbon nanotubes and a set of axially substituted phthalocyanines have been studied.
  • A search for X-ray flares in the nuclei of galaxies 

    Cunniffe, John (Trinity College (Dublin, Ireland). School of Physics, 2003)
    Observations of the giant elliptical galaxy NCG 4552 at ultraviolet wavelengths during the early 1990’s showed sharply peaked emission within ~2pc of its centre which initially brightened and then faded. The features of ...
  • Ultrafast non-linear optics for telecommunication applications 

    Communal, Jean-Edouard Paul Camille (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 ...
  • Design and fabrication of a waveguiding organic double heterostructure light-emitting device : a milestone in the development of an electrically pumped polymer laser 

    Belton, Colin (Trinity College (Dublin, Ireland). School of Physics, 2003)
    The development of an electrically pumped polymer laser fabricated using simple solution processing would revolutionise the optial data storage and communications industry. In order to achieve this, a research strategy, ...
  • Galaxy clusters, voids and elliptical galaxies using the ROSAT PSPC 

    Carr, Michael (Trinity College (Dublin, Ireland). School of Physics, 2003)
    The ROSAT data archive contains of the order of 100,000 sources observed by the ROSAT PSPC (Position Sensitive Proportional Counter). For many sources detected with the ROSAT PSPC there is not a sufficient number of photons ...