Browsing 02 Physical Sciences by Title

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Browsing 02 Physical Sciences by Title

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  • Radiation modes and roughness loss in high indexcontrast waveguides 
    Poulton Christopher; Koos Christian; Fujii Masafumi; Freude Wolfgang; Leuthold Juerg; Pfrang Andreas; Schimmel Thomas (IEEE Publications, 2006)
    Abstract—We predict the scattering loss in rectangular high index-contrast waveguides, using a new variation of the classical approach of coupled-mode theory. The loss predicted by this three-dimensional (3-D) model is ...
  • Random lasing in weakly scattering systems 
    Fanag W; Wu X; Yamilov A; Chabanov Andrey; Asatryan Ara; Botten Lindsay; Cao H (American Physical Society, 2006)
    We present detailed experimental and numerical studies of random lasing in weakly scattering systems. The interference of scattered light. which is weak in the passive systems, is greatly enhanced in the presence of ...
  • Realizing a framework for enhancing the laboratory experiences of non-physics majors: from pilot to large-scale implementation 
    Kirkup Leslie; Pizzica Jenny; Waite Katrina; Srinivasan Lakshmi (Institute of Physics Publishing, 2010)
    Physics experiments for students not majoring in physics may have little meaning for those students and appear to them unconnected in any way to their majors. This affects student engagement and influences lhe extent to ...
  • Recirculation-enhanced switching in photonic crystal Mach-Zehnder interferometers 
    White Tom; De Sterke C; Mcphedran Ross; Huang Tom; Botten Lindsay (Optical Society of America, 2004)
    We show that Mach-Zehnder interferometers (MZIs) formed from waveguides in a perfectly reflecting cladding can display manifestly different transmission characteristics to conventional MZIs due to mode recirculation and ...
  • Rectification in Donor-Acceptor Molecular Junctions 
    Hoft Rainer; Cortie Michael; Mcdonagh Andrew; Ford Michael (IOP Publishing, 2008)
    We perform density functional theory (DFT) calculations on molecular junctions consisting of a single molecule between two Au(111) electrodes. The molecules consist of an alkane or aryl bridge connecting acceptor, donor ...
  • Reducing the influence of spatial resolution to improve quantitative accuracy in emission tomography: A comparison of potential strategies 
    Hutton, B.; Olsson, A.; Som, S.; Erlandsson, K.; Braun, M. (Elsevier, 2006)
    The goal of this paper is to compare strategies for reducing partial volume effects by either minimizing the cause (i.e. improving resolution) or correcting the effect. Correction for resolution loss can be achieved either ...
  • Reforming the Teaching of uncertainty to undergraduate science and engineering students 
    Kirkup Leslie (Metrology Society of Australia, 2004)
    The ISO Guide to the Expression of Uncertainty in Measurement (GUM) has made little impact on the way uncertainty is taught in tertiary education institutions. The methods used for determining uncertainty, as currently ...
  • Relation Between Catalyst-Assisted Transformation And Multiple-Copy Transformation For Bipartite Pure States 
    Feng Yuan; Duan Runyao; Ying Mingsheng (American Physical Soc, 2006)
    We show that in some cases, catalyst-assisted entanglement transformation cannot be implemented by multiple-copy transformation for pure states. This fact, together with the result we obtained in R. Y. Duan, Y. Feng, X. ...
  • 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 ...
  • Relative Local Density Of States And Cloaking In Finite Clusters Of Coated Cylinders 
    Nicorovici Nicolae; Mcphedran Ross; Botten Lindsay (Taylor & Francis Ltd, 2011)
    We describe a method for accurate calculation of the Relative Local Density of States (RLDOS) as a function of frequency and position in finite sets of coated cylinders. The RLDOS is important, since it describes the ...
  • Relative local density of states for homogeneous lossy materials 
    Nicorovici Nicolae; Mcphedran Ross; Botten Lindsay (Elsevier, 2010)
    We derive the appropriate form of the relative local density of states (RLDOS) for the two-dimensional Helmholtz equation in a homogeneous lossy medium, and give the corresponding result for the three-dimensional equation. ...
  • A review of the optical properties of alloys and intermetallics for plasmonics 
    Blaber Martin; Arnold Matthew; Ford Michael (IOP Publishing, 2010)
    Alternative materials are required to enhance the efficacy of plasmonic devices. We discuss the optical properties of a number of alloys, doped metals, intermetallics, silicides, metallic glasses and high pressure materials. ...
  • 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 ...
  • Room-temperature solution synthesis of Bi2O3 nanowires for gas sensing application 
    Gou Xinglong; Li Rong; Wang Guoxiu; Chen Zhi; Wexler David (Institute of Physics (UK), 2009)
    A simple room-temperature solution chemical route for bulk synthesis of high quality ?- Bi2O3 nanowires has been demonstrated. The nanowires have a diameter of about 50 nm and a length in the range of several to tens of ...
  • Sample preparation of a novel titanium-aluminium composite for EBSD analysis 
    Attard D; Wuhrer Richard; Huggett Paul; Moran Ken (Cambridge University Press, 2006)
  • Scattering from sidewall deformations in photonics crystals 
    Poulton Christopher; Mueller Manfred; Freude Wolfgang (Optical Society of America, 2005)
    We present results from a new method for the solution of electromagnetic scattering from finite sets of twodimensional cylinders exhibiting sidewall deformations. Our model treats the sidewall deviation as a small perturbation ...
  • Schlomilch series and grating sums 
    Mcphedran Ross; Nicorovici Nicolae; Botten Lindsay (Institute of Physics Publishing, 2005)
    We consider sums over the set of positive integers relevant to construction of periodic Green’s functions for diffraction gratings and similar problems, and provide a general formula for a combination of Bessel functions ...
  • Secondary electron imaging at gas pressures in excess of 1 kPa 
    Toth Milos; Uncovsky M; Knowles William; Baker F S (Amer Inst Physics, 2007)
    Environmental scanning electron microscopy (ESEM) enables electron imaging of gas-mediated, direct-write nanolithography processes, liquids, and hydrated biomaterials. However, ESEM is limited by poor image quality at gas ...
  • Selective nanomanipulation using optical forces 
    Chaumet Patrick; Rahmani Adel; Nieto-Vesperinas Manuel (American Physical Society, 2002)
    We present a detailed theoretical study of the recent proposal for selective nanomanipulation of nanometric particles above a substrate using near-field optical forces [P.C. Chaumet et al., Phys. Rev. Lett. 88, 123601 (2002)]. ...
  • SEM and EBSD Investigations of High-Chromium Cast Irons 
    Hinckley Brook; Dolman Kevin; Wuhrer Richard; Ray Abhi; Yeung Wing (Cambridge University Press, 2008)
    High-chromium white cast irons are alloys that are based on the iron-chromium-carbon system and are classified in ISO 21988-2006 as abrasion-resistant cast irons that contain greater than 11% chromium. High-chromium white ...