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  • Near Infra-Red Radiation Squeezing Through 20nm Voids in Obliquely Deposited Metal Films 
    Smith Geoffrey; Hossain A; Gentle Angus (American Institute of Physics, 2001)
    Obliquely deposited metal films which are nearly continuous, displaying several unexpected solar optical properties. Transmittance intensity, spectral character, preferred direction of incidence, and polarization ...
  • Depth-Resolved Cathodoluminescence Microanalysis of Near-Edge Emission in Ill-Nitride Thin Films 
    Gelhausen Olaf; Phillips Matthew; Toth Milos (American Institute of Physics, 2001)
    We describe an approach to assess the quality of III-nitride thin films using depth-resolved cathodoluminescence (CL) microanalysis. In this procedure, the depth-resolved peak shift due to self-absorption of the near-edge ...
  • Confinement Losses in Microstructured Optical Fibres 
    White Tom; Mcphedran Ross; De Sterke C; Botten Lindsay; Steel Michael (Optical Society of America, 2001)
    We describe a multipole formulation that can be used for high-accuracy calculations of the full complex propagation constant of a microstruetured optical fiber with a finite number of holes. We show how the imaginary part ...
  • Local Observation and Spectroscopy of Optical Modes in Active Photonic Crystal Microcavity 
    Gerard Davy; Louvion Nicolas; Callard Segolene; Rahmani Adel; De Fornel Frederique; Mouette J; Letarte Xavier; Seassal Christian (Australia and New Zealand Third Sector Research, 2001)
    We report the direct, room-temperature, near-field mapping and spectroscopy of the optical modes of a photonic-crystal microcavity containing quantum wells. We use a near-field optical probe to reveal the imprint of the ...
  • XPS and AFM surface studies of solvent-cast PS/PMMA blends 
    Ton-That Cuong; Shard Alex; Teare D.; Bradley R. (Elsevier Ltd, 2001)
    Films of polystyrene (PS) and poly(methyl methacrylate) (PMMA) blends of two different thicknesses have been examined by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Blends with different ...
  • Linear optical properties of Ge nanocrystals in silica 
    Dowd Annette; Elliman Robert; Luther-Davies Barry (American Institute of Physics, 2001)
    The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant ...
  • Calculations of Air-Guided Modes in Photonic Crystal Fibres Using the Multipole Method 
    White Thomas; Mcphedran Ross; Botten Lindsay; Smith Geoff; De Sterke C (Optical Society of America, 2001)
    We demonstrate that a combination of multipole and Bloch methods is well suited for calculating the modes of air core photonic crystal fibers. This includes determining the reflective properties of the cladding, which ...
  • Symmetry and Degeneracy in Microstructural Optical Fibres 
    Steel Michael; White Thomas; De Sterke C; Mcphedran Ross; Botten Lindsay (Optical Society of America, 2001)
    The symmetry of an optical waveguide determines its modal degeneracies. A fiber with rotational symmetry of order higher than 2 has modes that either are nondegenerate and support the complete fiber symmetry or are twofold ...
  • Multipole Method for Microstructured Optical Fibers. I. Formulation 
    White Tom; Kuhlmey Boris; Mcphedran Ross; Maystre Daniel; Renversez Gilles; De Sterke C; Botten Lindsay (Optical Society of America, 2002)
    We describe a multipole method for calculating the modes of microstructured optical fibers. The method uses a multipole expansion centered on each hole to enforce boundary conditions accurately and matches expansions with ...
  • Modelling dynamics of a continuous structure with a piezoelectric sensor/actuator for passive structural control 
    Zhang Nong; Kirpitchenko Inessa (Academic Press, 2002)
    This paper presents the concept of a vibration control system in which motions of a continuous structure with piezoelectricsensors/actuators can be suppressed (or activated) through transforming mechanical energy to ...
  • Elastic waves and homogenization in oblique periodic structures 
    Zalipaev Victor; Movchan Alexander; Poulton Christopher; Mcphedran Ross (Royal Society, 2002)
    A mathematical model has been constructed to describe elastic waves propagating in a two¿dimensional solid containing a doubly periodic parallelogram array of circular holes. A multipole expansion method is employed which ...
  • Rietveld refinement of neutron synchrotron and combined powder diffraction data of cement clinker 
    Peterson Vanessa; Hunter Brett; Ray Abhi; Aldridge Laurie (SpringerVerlag, 2002)
    Ordinary Portland-cement clinkers were characterised using neutron and synchrotron powder diffraction. Rietveld analysis was performed using individual as well as combined data. Comparisons were made between ...
  • Magnetic-field-induced enhancement of terahertz emission from III-V semiconductor surfaces 
    Johnston Michael; Corchia A; Dowd Annette; Linfield Edmund; Davies A.; Mclaughlin Robert; Arnone Don; Pepper Michael (Elsevier, 2002)
    We discuss the origins of the magnetic-field-induced enhancement of terahertz (THz) emission from bulk semiconductor surfaces. The principal effect of the magnetic field is to rotate the THz dipole and hence dramatically ...
  • Probleme spectral pour la propagation conique des ondes elastiques dans un reseau de fibres 
    Guenneau Sebastien; Poulton Christopher; Movchan Alexander (Elsevier, 2002)
    This Note is devoted to the analysis of elastic waves conically propagating through a doubly periodic array of cylindrical channels. A new method, based on a multiple scattering approach, has been proposed to reduce the ...
  • Coupled dipole method with an exact longwavelength limit and improved accuracy at finite frequencies 
    Rahmani Adel; Chaumet Patrick; Bryant Garnett (Optical Society of America, 2002)
    We present a new formulation of the coupled dipole method that accounts for local-field effects and is exact in the long-wavelength limit. This formulation also leads to improved accuracy of the description of ...
  • Generation of highpower terahertz pulses in a prism 
    Johnston Michael; Whittaker David; Dowd Annette; Davies A.; Linfield Edmund; Li X; Ritchie D (Optical Society of America, 2002)
    A compact, high-power emitter of half-cycle terahertz (THz) radiation is demonstrated. The device consists of an epitaxial InAs emitter upon a GaAs prism and produces THz pulses that are 20 times more powerful than those ...
  • A method to measure the effective gas path length in the environmental or variable pressure scanning electron microscope 
    Gauvin Ranald; Griffin Brendan; Nockolds Clive; Phillips Matthew; Joy David (Wiley, 2002)
    A simple method is described to determine the effective gas path length when incident electrons scatter in the gas above the specimen. This method is based on the measurement of a characteristic x-ray line emitted from a ...
  • Relationship between sample morphology and carrier diffusion length in GaN thin films. 
    Godlewski Marek; Goldys Ewa; Phillips Matthew; Bottcher T; Figge Stephan; Hommel Detlef; Czernecki R; Prystawko P; Leszczynski M; Perlin Piotr; Wisniewski P; Suski T; Bockowski M; Grzegory Izabella; Porowski Sylvek (Polish Academy of Science, 2002)
    Scanning and spot-mode cathodoluminescence investigations of homo- and hetero-epitaxial GaN films indicate a surprisingly small influence of their microstructure on overall intensity of a light emission . This we explain ...
  • Magnetic Fields in Barred Galaxies. I. The Atlas 
    Ehle, M.; Shoutenkov, V.; Thierbach, M.; Harnett, J. I.; Haynes, R. F.; Sokoloff, D. D.; Beck, R.; Shukurov, A. (EDP Sciences, 2002)
  • Indentation-induced damage in GaN epilayers 
    Bradby, J.; Kucheyev, S. O.; Williams, J. S.; Wong-Leung, J.; Swain, M. V.; Munroe, P.; Li, G., Phillips, M. R. (American Institute of Physics, 2002)
    The mechanical deformation of wurtzite GaN epilayers grown on sapphire substrates is studied by spherical indentation, cross-sectional transmission electron microscopy (XTEM), and scanning cathodoluminescence (CL) ...