Now showing items 102-121 of 1359

  • Broadband impedance-matched electromagnetic structured ferrite composite in the megahertz range 

    Parke, L.; Youngs, I.J.; Hibbins, Alastair P.; Sambles, J. Roy (American Institute of Physics (AIP), 2014)
    A high refractive-index structured ferrite composite is designed to experimentally demonstrate broadband impedance matching to free-space. It consists of an array of ferrite cubes that are anisotropically spaced, thereby ...
  • A broadband metasurface Luneburg lens for microwave surface waves 

    de Pineda, JD; Mitchell-Thomas; Hibbins, AP; Sambles, JR (AIP Publishing, 2017-11)
    A broadband planar microwave Luneburg lens made of a three-layer metasurface with hexagonal symmetry is presented. This metasurface supports a transverse-electric mode confined to the surface that presents very low dispersion ...
  • Brown dwarfs and very low mass stars in the Hyades cluster : a dynamically evolved mass function 

    Bouvier, Jerome; Kendall, T.R.; Meeus, G.; Testi, L.; Moraux, E.; Stauffer, J.R.; James, D.; Cuillandre, J.C.; Irwin, J.; McCaughrean, M.J.; Baraffe, I.; Bertin, E. (EDP Sciences for European Southern Observatory (ESO), 2008)
    We conducted a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625 Myr-old Hyades cluster in order to derive the cluster's mass function across the stellar-substellar boundary. We performed a deep (I=23, ...
  • Building a better future: An exploration of beliefs about climate change and perceived need for adaptation within the building industry 

    Morton, Thomas A.; Bretschneider, Pamela; Coley, David; Kershaw, Tristan (Elsevier, 2011)
    The present research explored beliefs about climate change among an important yet relatively understudied population: representatives of the building industry. We also assessed the perceived adequacy of current climate-related ...
  • Can lasing at visible wavelengths be achieved using the low-loss long-range surface plasmon-polariton mode? 

    Winter, G.; Wedge, S.; Barnes, William L. (Institute of Physics and Deutsche Physikalische Gesellschaft, 2006)
    The use of emissive dye molecules as a gain medium in order to excite the low-loss long-range surface plasmon-polariton (SPP) mode on a thin silver film has previously been suggested as a method of achieving SPP lasing at ...
  • Can non-ideal magnetohydrodynamics solve the magnetic braking catastrophe? 

    Wurster, J; Price, DJ; Bate, Matthew R. (Oxford University Press (OUP), 2016-01-11)
    We investigate whether or not the low ionization fractions in molecular cloud cores can solve the 'magnetic braking catastrophe', where magnetic fields prevent the formation of circumstellar discs around young stars.We ...
  • Can non-ideal magnetohydrodynamics solve the magnetic braking catastrophe? (dataset) 

    Wurster, James; Bate, Matthew; Price, Daniel J (University of Exeter, 2015-12-31)
    We investigate whether or not the low ionization fractions in molecular cloud cores can solve the ‘magnetic braking catastrophe’, where magnetic fields prevent the formation of circumstellar discs around young stars. We ...
  • Canonical quantization of electromagnetism in spatially dispersive media 

    Horsley, S.A.R.; Philbin, Thomas G. (IOP Publishing, 2014)
    We find the action that describes the electromagnetic field in a spatially dispersive, homogeneous medium. This theory is quantized and the Hamiltonian is diagonalized in terms of a continuum of normal modes. It is found ...
  • Canonical quantization of electromagnetism in spatially dispersive media 

    Horsley, S.A.R.; Philbin, Thomas G. (IOP Publishing, 2014)
    We find the action that describes the electromagnetic field in a spatially dispersive, homogeneous medium. This theory is quantized and the Hamiltonian is diagonalized in terms of a continuum of normal modes. It is found ...
  • Canonical quantization of macroscopic electromagnetism 

    Philbin, Thomas G. (Institute of Physics, 2010)
    Application of the standard canonical quantization rules of quantum field theory to macroscopic electromagnetism has encountered obstacles due to material dispersion and absorption. This has led to a phenomenological ...
  • Canonical quantization of the electromagnetic field interacting with a moving dielectric medium 

    Horsley, S.A.R. (American Physical Society, 2012)
    The electromagnetic field is canonically quantized in the presence of a linear, dispersive, and dissipative medium that is in uniform motion. Specifically we calculate the change in the normal modes of the coupled matter-field ...
  • Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy 

    Ulbricht, Ronald; Hendry, Euan; Shan, Jie; Heinz, Tony F.; Bonn, Mischa (American Physical Society, 2011)
    Time-resolved, pulsed terahertz spectroscopy has developed into a powerful tool to study charge carrier dynamics in semiconductors and semiconductor structures over the past decades. Covering the energy range from a few ...
  • Cascaded Optical Field Enhancement in Composite Plasmonic Nanostructures 

    Kravets, V.G.; Zoriniants, George; Burrows, Christopher P.; Schedin, F.; Casiraghi, C.; Klar, P.; Geim, A.K.; Barnes, William L.; Grigorenko, A.N. (American Physical Society, 2010)
    We present composite plasmonic nanostructures designed to achieve cascaded enhancement of electromagnetic fields at optical frequencies. Our structures were made with the help of electron-beam lithography and comprise a ...
  • Casimir effect from macroscopic quantum electrodynamics 

    Philbin, Thomas G. (Institute of Physics, 2011)
    The canonical quantization of macroscopic electromagnetism was recently presented in New J. Phys. 12 (2010) 123008. This theory is here used to derive the Casimir effect, by considering the special case of thermal and ...
  • Casimir stress in an inhomogeneous medium 

    Philbin, Thomas G.; Xiong, C.; Leonhardt, Ulf (Elsevier Masson, 2010)
    The Casimir effect in an inhomogeneous dielectric is investigated using Lifshitz's theory of electromagnetic vacuum energy. A permittivity function that depends continuously on one Cartesian coordinate is chosen, bounded ...
  • Caveolae in Rabbit Ventricular Cardiomyocytes: Distribution and Dynamic Diminution after Cell Isolation 

    Burton, RAB; Rog-Zielinska, EA; Corbett, AD; Peyronnet, RPJ; Bodi, I; Fink, M; Sheldon, J; Hoenger, A; Calaghan, S; Bub, G; Kohl, P (Biophysical Society, 2017-09-05)
    Introduction: Caveolae are signal transduction centres, yet their subcellular distribution and preservation in cardiac myocytes after cell-isolation are not well documented. Here, we quantify caveolae, located within 100 ...
  • Cavity enhanced third harmonic generation in graphene 

    Beckerleg, C; Constant, TJ; Zeimpekis, I; Hornett, SM; Craig, C; Hewak, DW; Hendry, E (AIP Publishing, 2018-01-04)
    Graphene displays a surprisingly large third order nonlinearity. Here, we report that conversion efficiencies approaching 10 -4 are possible for third harmonic generation (THG). Moreover, the atomically thin nature of ...
  • Cellular and Molecular Anatomy of the Human Neuromuscular Junction 

    Jones, RA; Harrison, C; Eaton, SL; Llavero Hurtado, M; Graham, LC; Alkhammash, L; Oladiran, OA; Gale, A; Lamont, DJ; Simpson, H; Simmen, MW; Soeller, C; Wishart, TM; Gillingwater, TH (Elsevier (Cell Press), 2017-11-28)
    The neuromuscular junction (NMJ) plays a fundamental role in transferring information from lower motor neuron to skeletal muscle to generate movement. It is also an experimentally accessible model synapse routinely studied ...
  • A CGPS Look at the Spiral Structure of the Outer Milky Way. I. Distances and Velocities to Star-Forming Regions 

    Foster, TJ; Brunt, CM (American Astronomical Society, 2015-10-14)
    We present a new catalog of spectrophotometric distances and line of sight systemic velocities to 103 H II regions between 90≤ℓ≤195 (longitude quadrants II and part of III). Two new velocities for each region are independently ...
  • Characterisation of a fibre optic Raman probe within a hypodermic needle. 

    Iping Petterson, IE; Day, JC; Fullwood, LM; Gardner, B; Stone, N (Springer Verlag, 2015-09-28)
    We demonstrate the first use of a multifibre Raman probe that fits inside the bore of a hypodermic needle. A Raman probe containing multiple collection fibres provides improved signal collection efficiency in biological ...