Browsing 02 Physical Sciences by Title

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Browsing 02 Physical Sciences by Title

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  • Strain Relation in GaNxP1-x Alloy: Effect on Optical Properties 
    Goldys Ewa; Chen W.; Phillips Matthew; Buyanova Irina; Xin H; Tu Charles (Elsevier Science, 2001)
    By using scanning electron microscopy and cathodoluminescence (CL), a decrease in radiative efficiency of GaNP alloy with increasing N content is seen due to the formation of structural defects. The defect formation is ...
  • Strong photon-mixing of terahertz waves in semiconductor quantum wells induced by Rashba spin-orbit coupling 
    Gao Feng; Wang Guoxiu; Zhang Chao (Institute of Physics (UK), 2008)
    We demonstrate that due to the Rashba spin¿orbit coupling in semiconductor quantum wells, there is strong photo-mixing by mobile carriers in the terahertz frequency regime. The third order nonlinear current is of the same ...
  • Structural and electronic properties of Fe3+ and Fe2+ centers in GaN from optical and EPR experiments 
    Malguth Enno; Hoffmann Axel; Gehlhoff W; Gelhausen Olaf; Phillips Matthew; Xu X (American Physical Society, 2006)
    This work provides a consistent picture of the structural, optical, and electronic properties of Fe-doped GaN. A set of high-quality GaN crystals doped with Fe at concentrations ranging from 5 X 1017 cm-3 to 2 X 1020 ...
  • Structural and electronic properties of ordered La@C82 films on Si(111) 
    Ton-That Cuong; Shard Alex; Egger S.; Taninaka Atsushi; Shinohara Hisanori; Welland Mark (Elsevier, 2003)
    The growth of endohedral fullerene La@C82 films on Si(1 1 1) has been explored by scanning tunneling microscopy (STM). The STM images reveal the molecules are hexagonally close-packed in multilayer films with the inter-molecular ...
  • Structural and optical inhomogeneities of Fe doped GaN grown by hydride vapor phase epitaxy 
    Malguth Enno; Hoffmann Axel; Phillips Matthew (American Institute of Physics, 2008)
    We present the results of cathodoluminescence experiments on a set of Fe doped GaN samples with Fe concentrations of 5×1017, 1×1018, 1×1019, and 2×1020 cm-3. These specimens were grown by hydride vapor phase epitaxy with ...
  • Structural colours through photonic crystals 
    Mcphedran Ross; Nicorovici Nicolae; Mckenzie David; Rouse Greg; Botten Lindsay; Welch Victoria; Parker Andrew; Wohlgennant M; Vardeny Zeev (Elsevier Science Bv, 2003)
    We discuss two examples of living creatures using photonic crystals to achieve iridescent colouration. The first is the sea mouse (Aphroditidae, Polychaeta), which has a hexagonal close packed structure of holes in its ...
  • Structurallyperturbed chiral Bragg reflectors for elliptically polarized light 
    Hodgkinson Ian; Wu Qi; De Silva Lakshman; Arnold Matthew; Lakhtakia Akhlesh; Mccall Martin (Optical Society of America, 2005)
    The structure of an inorganic chiral medium represented as a stack of identical form-birefringent layers that twist steadily with increasing thickness is perturbed by realigning a fraction of each layer to a fixed ...
  • Structural refinement in high temperature annealing of magnetron sputtered titanium vanadium nitride coatings 
    Yeung Wing; Wuhrer Richard; Attard D (Trans Tech Publications Ltd, 2006)
    Development of advanced ternary nitride coatings such as titanium aluminium nitride and titanium vanadium nitride has attracted significant industrial interest in recent years. Titanium vanadium nitride is considered one ...
  • Study with Magnetic Property Measurement of Soft Magnetic Composite Material and Its Application in Electrical Machines 
    Zhu Jianguo; Guo Youguang (The Institute of Electrical and Electronic Engineers Inc (IEEE), 2004)
    This paper reports our study with the magnetic property measurements of soft magnetic composite (SMC) materials under both alternating and rotational magnetic excitations, and development of different electrical machines ...
  • Subwavelength Optical Imaging Of Evanescent Fields Using Reflections From Plasmonic Slabs 
    Arnold Matthew; Blaikie Richard (Optical Society of America, 2007)
  • Supermodes in multiple coupled photonic crystal waveguides 
    Botten Lindsay; Hansen Robert; De Sterke C (Optical Society of America, 2006)
    We analyze the supermodes in multiple coupled photonic crystal waveguides for long-wavelengths. In the tight-binding limit we obtain analytic results that agree with fully numerical calculations. We find that when the ...
  • Supermodes of chiral photonic filters with combined twist and layer defects 
    Hodgkinson Ian; Wu Qi; De Silva Lakshman; Arnold Matthew; Mccall Martin; Lakhtakia Akhlesh (American Physical Society, 2003)
    We consider the circularly polarized localized modes of chiral photonic structures with combined central twist and isotropic layer defects. The general filter is shown to suffer from anomalous remittance and saturation ...
  • Suppression Of Anderson Localization In Disordered Metamaterials 
    Botten Lindsay; Asatryan Ara; Mcphedran Ross; Freilikher Vd; Byrne Maria; Shadrivov Iv; Gredeskul Sa (American Society for Microbiology, 2005)
    We study wave propagation in mixed, 1D disordered stacks of alternating right- and left-handed layers and reveal that the introduction of metamaterials substantially suppresses Anderson localization. At long wavelengths, ...
  • Surface electronic properties of ZnO nanoparticles 
    Phillips Matthew; Foley Matthew; Stampfl Anton; Ton-That Cuong; Moody Steven (Amer Inst Physics, 2008)
    The surface electronic structure of ZnO nanoparticles has been studied with photoemission and x-ray absorption spectroscopies. Contrary to expectation, ZnO:Zn phosphor nanoparticles were found to contain a lower oxygen ...
  • Surface Type Classification With a Laser Range Finder 
    Kirchner Nathan; Liu Dikai; Dissanayake Gamini (Ieee-Inst Electrical Electronics Engineers Inc, 2009)
    This paper presents a system for surface classification using a laser range finder. It is shown that the return intensities and range errors provide sufficient information to distinguish a wide range of surfaces commonly ...
  • 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 ...
  • Synthesis and Characterization of Doped and Undoped ZnO Nanostructures 
    Mcbean Katie; Phillips Matthew; Goldys Ewa (Cambridge University Press, 2006)
    Zinc oxide (ZnO) nanoparticles have been produced using precipitation methods from ethanolic solution. Rare-earth metal doping was performed, and the effect of lithium codoping on the luminescence properties of the ...
  • Synthesis and characterization of one-dimensional CdSe nanostructures 
    Wang Guoxiu; Park M.; Wexler D.; Chen J.; Liu H. (American Institute of Physics, 2006)
    One-dimensional (1D) CdSe nanostructures, including nanowires, nanotubes, nanorods, nanobelts, and even nanostructures resembling saws and tree branches, have been synthesized by sublimation of CdSe powders under various ...
  • System for measuring the junction temperature of a light emitting diode immersed in liquid nitrogen 
    Kirkup Leslie; Kalceff Walter; Mccredie Geoffrey (American Institute of Physics, 2006)
    A versatile system has been developed for the measurement under LABVIEW™ control of junction temperatures in a light emitting diode (LED). Measurements are reported on a commercially available high-intensity InGaAlP LED ...
  • A system for supplying constant electrical power for postprocessing tin-doped indium oxide films 
    Bertinshaw Joel; Kirkup Leslie; Phillips Matthew; Placido Frank (American Institute of Physics, 2008)
    Annealing tin doped indium oxide (ITO) thin films by self-heating shows potential for reducing the crystallization temperature required to optimize the optical and electrical properties of the films. It also shows promise ...