Now showing items 283-302 of 729

  • Illusions and cloaks for surface waves 

    McManus, TM; Valiente-Kroon, JA; Horsley, S.A.R.; Hao, Y (Nature Publishing Group, 2014-08-22)
    Ever since the inception of Transformation Optics (TO), new and exciting ideas have been proposed in the field of electromagnetics and the theory has been modified to work in such fields as acoustics and thermodynamics. ...
  • Imaging collective magnonic modes in 2D arrays of magnetic nanoelements 

    Kruglyak, V.V.; Keatley, Paul Steven; Neudert, A.; Hicken, R.J.; Childress, J.R.; Katine, J.A. (American Physical Society, 2010)
    We have used time resolved scanning Kerr microscopy to image collective spin wave modes within a 2D array of magnetic nanoelements. Long wavelength spin waves are confined within the array as if it was a continuous element ...
  • Imaging small-amplitude magnetization dynamics in a longitudinally magnetized microwire 

    Kruglyak, V.V.; Keatley, Paul Steven; Neudert, A.; Delchini, M.; Hicken, R.J.; Childress, J.R.; Katine, J.A. (American Physical Society, 2008)
    We have used time-resolved scanning Kerr microscopy to study spin waves in a magnetic microwire subjected to a bias magnetic field applied parallel to its long axis. The spin-wave spectra obtained from different points ...
  • Imaging the dephasing of spin wave modes in a square thin film magnetic element 

    Barman, A.; Kruglyak, V.V.; Hicken, R.J.; Rowe, J.M.; Kundrotaite, A.; Scott, J.; Rahman, M. (American Physical Society, 2004)
    We have used time-resolved scanning Kerr effect microscopy to study dephasing of spin wave modes in a square Ni81Fe19 element of 10 μm width and 150 nm thickness. When a static magnetic field H was applied parallel to an ...
  • Imaging the uptake of gold nanoshells in live cells using plasmon resonance enhanced four wave mixing microscopy 

    Garrett, Natalie; Whiteman, Matthew; Moger, Julian (Optical Society of America, 2011)
    Gold nanoshells (GNS) are novel metal nanoparticles exhibiting attractive optical properties which make them highly suitable for biophotonics applications. We present a novel investigation using plasmon-enhanced four wave ...
  • The implications of transporting architecture on human health 

    Eames, ME; Wood, M; Challenor, Peter G. (-, 2015-12)
    Where modern buildings are unable to maintain the internal environment to within comfort levels they often rely on mechanical systems to become habitable. This could be due to bad design or putting the building in an ...
  • Importance of diffraction in determining the dispersion of designer surface plasmons 

    Hendry, Euan; Hibbins, Alastair P.; Sambles, J. Roy (American Physical Society, 2008)
    By employing a modified modal matching approach, we obtain explicit analytical expressions relating frequency to in-plane wave vector for the surface electromagnetic mode confined at the interface between vacuum and a ...
  • The importance of radiative feedback for the stellar initial mass function 

    Bate, Matthew R. (Oxford University Press / Royal Astronomical Society, 2009)
    We investigate the effect of radiative feedback on the star formation process using radiation hydrodynamical simulations. We repeat the previous hydrodynamical star cluster formation simulations of Bate et al. and Bate & ...
  • In vivo cervical intervertebral disc characterisation by elastography. 

    Vergari, C; Rouch, P; Dubois, G; Bonneau, D; Dubousset, J; Tanter, M; Gennisson, JL; Skalli, W (Taylor & Francis, 2014-07-30)
    Not available
  • In vivo chemical and structural analysis of plant cuticular waxes using stimulated Raman scattering microscopy. 

    Littlejohn, George; Mansfield, Jessica; Parker, David; Lind, Rob; Perfect, Sarah; Seymour, Mark; Smirnoff, Nicholas; Love, John; Moger, Julian (American Society of Plant Biologists, 2015-05)
    The cuticle is a ubiquitous, predominantly waxy layer on the aerial parts of higher plants that fulfils a number of essential physiological roles, including regulating evapotranspiration, light reflection, and heat tolerance, ...
  • Independently controlling permittivity and diamagnetism in broadband, low-loss, isotropic metamaterials at microwave frequencies 

    Parke, L.; Hooper, Ian R.; Edwards, E.; Cole, N.; Youngs, I.J.; Hibbins, Alastair P.; Sambles, J. Roy (American Institute of Physics (AIP), 2015-03-09)
    A metamaterial based on the design of Shin et al. [Phys. Rev. Lett. 102, 093903 (2009)] that allows independent control of its permeability and permittivity has been fabricated and experimentally characterised. It is ...
  • Indirect detection of forming protoplanets via chemical asymmetries in disks 

    Cleeves, L. Ilsedore; Bergin, Edwin A.; Harries, Tim J. (Institute of Physics Publishing, 2015-07-01)
    We examine changes in the molecular abundances resulting from increased heating due to a self-luminous planetary companion embedded within a narrow circumstellar disk gap. Using 3D models that include stellar and planetary ...
  • Induced currents in the quantum Hall regime: energy storage, persistence, and I-V characteristics 

    Smith, Martin J.; Usher, Charles D.H.; Williams, Charles D.H.; Shytov, A.V.; Sachrajda, A.S.; Kam, A.; Wasilewski, Z.R. (American Physical Society, 2012)
    Induced currents associated with the quantum Hall effect are studied in the temperature range 39 mK to 1.6 K, and at Landau-level filling factors ν=1,2,3,4, and 6, using torsion-balance magnetometry. A quantitative link ...
  • Induced currents, frozen charges and the quantum Hall effect breakdown 

    Kavokin, K.V.; Portnoi, M.E.; Matthews, A.J.; Usher, Alan; Gething, J.D.; Ritchie, D.A.; Simmons, M.Y. (Elsevier, 2005)
    Puzzling results obtained from torque magnetometry in the quantum Hall effect regime are presented, and a theory is proposed for their explanation. Magnetic moment saturation, which is usually attributed to the quantum ...
  • Inefficient star formation: The combined effects of magnetic fields and radiative feedback 

    Price, Daniel J.; Bate, Matthew R. (Oxford University Press / Royal Astronomical Society, 2009)
    We investigate the effects of magnetic fields and radiative protostellar feedback on the star formation process using self-gravitating radiation magnetohydrodynamical calculations. We present results from a series of ...
  • Influence of defect thickness on the angular dependence of coercivity in rare-earth permanent magnets 

    Bance, S; Oezelt, H; Schrefl, T; Ciuta, G; Dempsey, NM; Givord, D; Winklhofer, M; Hrkac, G; Zimanyi, G; Gutfleisch, O; Woodcock, TG; Shoji, T; Yano, M; Kato, A; Manabe, A (American Institute of Physics (AIP), 2014)
    The coercive field and angular dependence of the coercive field of single-grain Nd$_{2}$Fe$_{14}$B permanent magnets are computed using finite element micromagnetics. It is shown that the thickness of surface defects plays ...
  • The inner circumstellar disk of the UX Orionis star V1026 Scorpii 

    Vural, J; Kreplin, Alexander; Kishimoto, M; Weigelt, G; Hofmann, Karl-Heinz; Kraus, Stefan; Schertl, D; Dugué, M; Duvert, G; Lagarde, S; Massi, F (EDP Sciences for European Southern Observatory (ESO), 2014-04)
    Context. The UX Ori type variables (named after the prototype of their class) are intermediate-mass pre-main sequence objects. One of the most likely causes of their variability is the obscuration of the central star by ...
  • Interchain effects in the ultrafast photophysics of a semiconducting polymer: THz time-domain spectroscopy of thin films and isolated chains in solution 

    Hendry, Euan; Koeberg, Mattijs; Schins, Juleon M.; Nienhuys, H. K.; Sundström, V.; Siebbeles, L. D. A.; Bonn, Mischa (American Physical Society, 2005)
    We compare the generation and decay dynamics of charges and excitons in a model polymer semiconductor (MEH-PPV) in solution and drop-cast thin films, by recording the sub-ps transient complex conductivity using THz time-domain ...
  • Interfacial structure and half-metallic ferromagnetism in Co2MnSi-based magnetic tunnel junctions 

    Telling, N.D.; Keatley, Paul Steven; van der Laan, Gerrit; Hicken, R.J.; Arenholz, E.; Sakuraba, Y.; Oogane, M.; Ando, Y.; Miyazaki, T. (American Physical Society, 2006)
    X-ray absorption (XAS) and x-ray magnetic circular dichroism (XMCD) techniques are utilized to explore the ferromagnetic/barrier interface in Co2MnSi full Heusler alloy magnetic tunnel junctions. Structural and magnetic ...
  • The interferometric view of Herbig Ae/Be stars 

    Kraus, Stefan (Springer Verlag (Germany), 2015-05-13)
    In this contribution I review how optical interferometry has contributed to shaping our understanding of the class of Herbig Ae/Be stars and of their associated circumstellar disks. I discuss the evidence for an optically-thin ...