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Browsing 02 Physical Sciences by Title

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  • Nonlinear FDTD analysis and experimental verification in InGaAsPInP racetrack microresonators 
    Fujii Masafumi; Koos Christian; Poulton Christopher; Leuthold Juerg; Freude Wolfgang (IEEE Publications, 2006)
    We demonstrate for the first time a nonlinear finite-difference time-domain (FDTD) analysis of optical parametric four-wave mixing (FWM) in an actual InGaAsP–InP-based racetrack microresonator, and the results are ...
  • Nonlinear field effects in quadrupole mass filters 
    Schulte Jurgen; Schevschenko P; Radchik Alex (The American Institute of Physics, 1999)
    The performance of a quadrupole mass filter (QMF) generally degrades when using electrodes of circular cross section in place of mathematical ideal hyperbolic electrodes. The circular cross section of electrodes produces ...
  • Nonlinear Magnetic Model of Surface Mounted PM Machines Incorporating Saturation Saliency 
    Wang Yi; Zhu Jianguo; Wang Shuhong; Guo Youguang; Xu Wei (IEEE, 2009)
    In this paper a comprehensive nonlinear model of surface mounted permanent magnet synchronous machine (SPMSM) is proposed considering both the structural and the saturation saliencies to enable the numerical simulation of ...
  • Nonlinear Optical Properties Of Semiconducting Nanocrystals In Fused Silica 
    Dowd Annette; Samoc Marek; Luther-Davies Barry; Elliman Robert (Elsevier Science Bv, 1999)
    Degenerate four-wave mixing (DFWM) is used to examine the nonlinear optical response of Ge nanocrystals in a silica matrix. The nanocrystals are formed by implanting 1.0 MeV Ge ions into silica to a dose of 3.0x10(17) Ge ...
  • Nonlinear Optical Response Of Ge Nanocrystals In A Silica Matrix 
    Dowd Annette; Elliman Robert; Samoc Marek; Luther-Davies Barry (Amer Inst Physics, 1999)
    Time-resolved degenerate-four-wave-mixing measurements were used to study the nonlinear optical response (intensity-dependent refractive index! of Ge nanocrystallites embedded in a silica matrix. Nanocrystals were fabricated ...
  • Nonlinear photonic crystals in chalcogenide for all-optical processing 
    Grillet Christian; Smith Cameron; Lee Michael; Magi Eric; Moss D; Eggleton Benjamin; Freeman Darren; Madden Steve; Luther-Davies Barry; Byrne Michael; Asatryan Ara; Botten Lindsay (The Institute of Electrical and Electronic Engineers Inc (IEEE), 2006)
    We present the first experimental and theoretical results using nonlinear 2D photonic crystals in Chalcogenide. This scheme provides a promising platform to realize low power integrated all-optical switching and logic ...
  • Nonlinear response of a forced van der Pol-Duffing oscillator at non-resonant bifurcations of codimension two 
    Ji Jin; Zhang Nong (Pergamon-Elsevier Science Ltd, 2009)
    Non-resonant bifurcations of codimension two may appear in the controlled van der Pol-Duffing oscillator when two critical time delays corresponding to a double Hopf bifurcation have the same value. With the aid of centre ...
  • Nonlinear silicononinsulator waveguides for alloptical signal processing 
    Koos Christian; Jacome L; Poulton Christopher; Leuthold Juerg; Freude Wolfgang (Optical Society of America, 2007)
    Values up to γ = 7×106/(Wkm) for the nonlinear parameter are feasible if silicon-on-insulator based strip and slot waveguides are properly designed. This is more than three orders of magnitude larger than for state-of-the-art ...
  • Nonreciprocal transmission and low-threshold bistability in strongly modulated asymmetric nonlinear WBGs 
    Fujii Masafumi; Takashima Tetsuya; Maitra Ayan; Leuthold Juerg; Freude Wolfgang; Poulton Christopher (Optical Society of America, 2007)
    Nonreciprocal optical bistability is numerically investigated in InGaAsP/InP nonlinear waveguide Bragg gratings having a strong and asymmetric sidewall modulation. Minimum switching power as low as 77 mW is predicted by ...
  • Nonreciprocal transmission and Schmitt trigger operation in strongly modulated asymmetric WBGs 
    Fujii Masafumi; Maitra Ayan; Poulton Christopher; Leuthold Juerg; Freude Wolfgang (Optical Society of America, 2006)
    We investigate numerically a non-reciprocal switching behavior in strongly modulated waveguide Bragg gratings (WBGs) having a longitudinally asymmetric stopband configuration. The minimum power predicted for a stable ...
  • Non-Rigid Image Registation Using a Median-Filetered Coarse-to-Fine Displacement Field and a Symmetric Correlation Ratio 
    Lau Yiu; Braun Michael; Hutton Brian (Institute of Physics Publishing, 2001)
    Conventional approaches to image registration are generally limited to imagewide rigid transformations. However, the body and its internal organs are non-rigid structures that change shape due to changes in the body's ...
  • The Northern HIPASS catalogue data presentation completeness and reliability measures 
    Marquarding, M.; Kilborn, V. A.; Mader, S.; O'Brien, J.; Doyle, M. T.; Ryder, S. D.; Minchin, R. F.; Garcia-Appadoo, D.; Drinkwater, M. J.; Ekers, R. D.; Gibson, B. K.; Freeman, K. C.; Jerjen, H.; Zwaan, M. A.; Stootman, F.; Sadler, E. M.; Ryan-Weber, E.; Stevens, J.; Meyer, M. J.; Gurovich, S.; Staveley-Smith, L.; Webster, R. L.; Putman, M. E.; Knezek, P. M.; Koribalski, B. S.; Barnes, D. G.; Disney, M. J.; de Blok, W. J.; Kesteven, M. J.; Bhathal, R.; Stewart, I. M.; Wong, O.; Harnett, J. I.; Henning, P. A.; Waugh, M. (Blackwell Publishing, 2006)
    The Northern HIPASScatalogue (NHICAT) is the northern extension of the HIPASS catalogue, HICAT. This extension adds the sky area between the declination (Dec.) range of +20 < 8 < +25"30' to HICAT's Dec. range of -900 < ...
  • The Northern HIPASS catalogue - data presentation, completeness and reliability measures 
    de Blok, W. J.; Henning, P. A.; Minchin, R. F.; Garcia-Appadoo, D.; Disney, M. J.; Wong, O.; Waugh, M.; Knezek, P. M.; Sadler, E. M.; Ryan-Weber, E.; Putman, M. E.; Stootman, F.; Doyle, M. T.; Ryder, S. D.; Mader, S.; Barnes, D. G.; Stevens, J.; Ekers, R. D.; Zwaan, M. A.; Meyer, M. J.; Drinkwater, M. J.; Gurovich, S.; Jerjen, H.; Harnett, J. I.; Bhathal, R.; Kilborn, V. A; Stewart, I. M.; Koribalski, B. S.; Kesteven, M. J.; Webster, R. L.; O'Brien, J.; Gibson, B. K.; Staveley-Smith, L.; Marquarding, M.; Freeman, K. C. (Blackwell Publishing Asia, 2005)
    The Northern HIPASScatalogue (NHICAT) is the northern extension of the HIPASS catalogue, HICAT. This extension adds the sky area between the declination (Dec.) range of +2° < δ < +25°30' to HICAT's Dec. range of -90° < δ ...
  • Novel high-performance scattering materials for use in energy saving light fittings and skylights based on polymer pigmented with polymer 
    Smith Geoffrey; Earp Alan; Franklin James; Mccredie Geoffrey (SPIE, 2001)
    Simple quantitative performance criteria are developed for translucent materials in terms of hemispherical visible transmittance, and angular spread of transmitted luminance using a half angle. Criteria are linked to ...
  • Nuclear microprobe analysis of lead profile in crocodile bones 
    Orlic I.; Siegele R.; Hammerton K.; Jeffree Ross; Cohen D. (Elsevier Inc, 2003)
    Elevated concentrations of lead were found in Australian free ranging saltwater crocodile (Crocodylus porosus) bone and flesh. Lead shots were found as potential source of lead in these animals. ANSTO s heavy ion nuclear ...
  • Numerical analysis of the contribution of the transverse asymmetry in the photoinduced index change profile to the birefringence of optical fiber 
    Dossou Kokou; Larochelle Sophie; Fontaine Marie (IEEE Publications, 2002)
    The birefringence of an optical fiber resulting from an asymmetry of the index profile is numerically evaluated using a finite-element method with a full-vectorial formulation. Such asymmetric index profiles, assumed ...
  • Numerically efficient multipole method for photonic molecules 
    Schwefel H; Poulton Christopher; Wang L (IEEE/LEOS, 2008)
    A novel and numerically efficient multipole formulation for the calculation of resonances of photonic molecules is presented. Photonic molecules are often modeled as two dimensional coupled dielectric disks. We use the ...
  • Numerical study of guided modes in arrays of metallic nanowires 
    Koos Christian; Jacome L; Poulton Christopher; Leuthold Juerg; Freude Wolfgang (Optical Society of America, 2007)
    We numerically investigate the band structure and guided modes within arrays of metallic nanowires. We show that bandgaps appear for a range of array geometries and that these can be used to guide light in these structures. ...
  • Oblique propagation of electromagnetic and elastic waves for an array of cylindrical fibres 
    Guenneau Sebastien; Poulton Christopher; Movchan Alexander (Royal Society, 2003)
    This paper presents analysis of electromagnetic and elastodynamic waves propagating through a doubly periodic array of cylindrical channels in oblique incidence. A new method, based on a multipole scattering approach, has ...
  • Observation of blue shifts in ZnO/ZnMgO multiple quantum well structures by ion-implantation induced intermixing 
    Coleman V; Buda M; Tan Hark; Jagadish Chennupati; Phillips Matthew; Koike K; Sasa S; Inoue M; Yano M (Institute of Physics Publishing, 2006)
    Implantation with low-energy (80 keV) oxygen ions and subsequent rapid thermal annealing at 800 ◦C are used to induce intermixing in a stack of 19 ZnO/Zn0.7Mg0.3O multiple quantum wells grown on sapphire by molecular beam ...