Now showing items 675-694 of 877

  • Scanning Kerr microscopy study of current induced switching in Ta/CoFeB/MgO films with perpendicular magnetic anisotropy 

    Durrant, C.J.; Xiao, Gang; Hao, Qiang; Hicken, R.J. (American Physical Society, 2016)
    Ta/CoFeB/MgO trilayers with perpendicular magnetic anisotropy are expected to play a key role in the next generation of current and electric field switched memory and logic devices. In this study, we combine scanning Kerr ...
  • The science case for the Planet Formation Imager (PFI) 

    Kraus, Stefan; Monnier, John D.; Harries, Tim J.; Dong, R; Bate, Matthew R.; Whitney, B.; Zhu, Z; Buscher, David; Berger, J-P; Haniff, C; Ireland, M; Labadie, L; Lacour, Sylvestre; Petrov, R.; Ridgway, S; Surdej, J; ten Brummelaar, T; Tuthill, P; van Belle, G (Society of Photo-optical Instrumentation Engineers (SPIE), 2014-07)
    Among the most fascinating and hotly-debated areas in contemporary astrophysics are the means by which planetary systems are assembled from the large rotating disks of gas and dust which attend a stellar birth. Although ...
  • Sculpted-multilayer optical effects in two species of Papilio butterfly 

    Vukusic, Peter; Sambles, J. Roy; Lawrence, Christopher R.; Wakely, Gavin (Optical Society of America, 2001)
    The wing-scale microstructures associated with two species of Papilio butterfly are described and characterized. Despite close similarities in their structures, they do not exhibit analogous optical effects. With Papilio ...
  • Search for Carbon Monoxide in the Atmosphere of the Transiting Exoplanet HD 189733b 

    Desert, J.-M.; Lecavelier des Etangs, A.; Hebrard, G.; Sing, David K.; Ehrenreich, D.; Ferlet, R.; Vidal-Madjar, A. (IOP Publishing for American Astronomical Society, 2009)
    Water, methane, and carbon monoxide are expected to be among the most abundant molecules besides molecular hydrogen in the hot atmosphere of close-in extrasolar giant planets. Atmospheric models for these planets predict ...
  • A search for methane in the atmosphere of GJ 1214b via GTC narrow-band transmission spectrophotometry 

    Wilson, Paul A.; Colon, K.D.; Sing, David K.; Ballester, G.; Desert, J.-M.; Ehrenreich, D.; Ford, E.B.; Fortney, J.J.; Lecavelier des Etangs, A.; Lopez-Morales, M.; Morley, C.V.; Pettitt, Alex R.; Pont, F.; Vidal-Madjar, A. (Oxford University Press on behalf of the Royal Astronomical Society, 2014)
    We present narrow-band photometric measurements of the exoplanet GJ 1214b using the 10.4 m Gran Telescopio Canarias and the Optical System for Imaging and low Resolution Integrated Spectroscopy instrument. Using tuneable ...
  • Searching for confined modes in graphene channels: The variable phase method 

    Stone, D.A.; Downing, C.A.; Portnoi, M.E. (American Physical Society, 2012)
    Using the variable phase method, we reformulate the Dirac equation governing the charge carriers in graphene into a nonlinear first-order differential equation from which we can treat both confined-state problems in electron ...
  • The second data release of the INT Photometric Hα Survey of the Northern Galactic Plane (IPHAS DR2) 

    Barentsen, G; Farnhill, HJ; Drew, JE; González-Solares, EA; Greimel, R; Irwin, MJ; Miszalski, B; Ruhland, C; Groot, P; Mampaso, A; Sale, SE; Henden, AA; Aungwerojwit, A; Barlow, MJ; Carter, PJ; Corradi, RLM; Drake, JJ; Eislöffel, J; Fabregat, J; Gänsicke, BT; Gentile Fusillo, NP; Greiss, S; Hales, AS; Hodgkin, S; Huckvale, L; Irwin, J; King, R; Knigge, C; Kupfer, T; Lagadec, E; Lennon, DJ; Lewis, JR; Mohr-Smith, M; Morris, RAH; Naylor, T; Parker, QA; Phillipps, S; Pyrzas, S; Raddi, R; Roelofs, GHA; Rodríguez-Gil, P; Sabin, L; Scaringi, S; Steeghs, D; Suso, J; Tata, R; Unruh, YC; van Roestel, J; Viironen, K; Vink, JS; Walton, NA; Wright, NJ; Zijlstra, AA (Oxford University Press, 2014-09-15)
    © 2014. The INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) is a 1800 deg2 imaging survey covering Galactic latitudes b < 5<sup>°</sup> and longitudes ℓ = 30<sup>°</sup>-215<sup>°</sup> in the r, i, ...
  • The secondary eclipse of CoRoT-1b 

    Alonso, R.; Alapini, Aude; Aigrain, Suzanne; Auvergne, M.; Baglin, A.; Barbieri, M.; Barge, P.; Bonomo, A. S.; Bordé, P.; Bouchy, F.; Chaintreuil, S.; De la Reza, R.; Deeg, H. J.; Deleuil, M.; Dvorak, R.; Erikson, A.; Fridlund, M.; De Oliveira Fialho, F.; Gondoin, P.; Guillot, T.; Hatzes, A.; Jorda, L.; Lammer, H.; Léger, A.; Llebaria, A.; Magain, P.; Mazeh, T.; Moutou, C.; Ollivier, M.; Pätzold, M.; Pont, F.; Queloz, D.; Rauer, H.; Rouan, D.; Schneider, J.; Wuchterl, G. (EDP Sciences, 2009)
    The transiting planet CoRoT-1b is thought to belong to the pM-class of planets, in which the thermal emission dominates in the optical wavelengths. We present a detection of its secondary eclipse in the CoRoT white channel ...
  • The secondary eclipse of the transiting exoplanet CoRoT-2b 

    Alonso, R.; Guillot, T.; Mazeh, T.; Aigrain, Suzanne; Alapini, Aude; Barge, P.; Hatzes, A.; Pont, F. (EDP Sciences, 2009)
    We present a study of the light curve of the transiting exoplanet CoRoT-2b, aimed at detecting the secondary eclipse and measuring its depth. The data were obtained with the CoRoT satellite during its first run of more ...
  • Selective transmission through very deep zero-order metallic gratings at microwave frequencies 

    Went, H. E.; Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R.; Crick, A. P. (2000)
    Zero-order metal grating structures are found to give extraordinary selective transmission at microwave frequencies through the resonant excitation of coupled surface waves. The metal slat structures with dielectric spacings ...
  • A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood 

    Bell, Cameron Pearce MacDonald; Mamajek, E.E.; Naylor, Tim (Oxford University Press, 2015-09-24)
    We present a self-consistent, absolute isochronal age scale for young (< 200 Myr), nearby (< 100 pc) moving groups in the solar neighbourhood based on homogeneous fitting of semi-empirical pre-main-sequence model isochrones ...
  • Self-Organized Periodic Photonic Structure in a Nonchiral Liquid Crystal 

    Ruan, Lizhen; Sambles, J. Roy; Stewart, I. W. (American Physical Society, 2003)
    A hybrid-aligned cell of the smectic A liquid material 8CB gives two stable director configurations, one of which is periodic and gives strong diffraction of light. This photonic lattice director profile arises from ...
  • Sensing using differential surface plasmon ellipsometry 

    Hooper, Ian R.; Sambles, J. Roy (American Institute of Physics, 2004)
    In this work a differential ellipsometric method utilizing surface plasmons (SPs) for monitoring refractive index changes, which could be used in chemical and biological sensors, is presented. The method is based upon ...
  • Sensitivity of Localized Surface Plasmon Resonances to Bulk and Local Changes in the Optical Environment 

    Murray, W. Andrew; Auguié, Baptiste; Barnes, William L. (American Chemical Society, 2009)
    Single rod-shaped and disk-shaped gold nanoparticles with sizes ranging from 60 to 162 nm were analyzed using dark-field scattering spectroscopy. The sensitivity of the localized surface plasmon resonance (LSPR) of each ...
  • Short GMC lifetimes: an observational estimate with the PdBI Arcsecond Whirlpool Survey (PAWS) 

    Meidt, SE; Hughes, A; Dobbs, CL; Pety, J; Thompson, TA; García-Burillo, S; Leroy, AK; Schinnerer, E; Colombo, D; Querejeta, M; Kramer, C; Schuster, KF; Dumas, G (American Astronomical Society, 2015-06-09)
    We describe and execute a novel approach to observationally estimate the lifetimes of giant molecular clouds (GMCs). We focus on the cloud population between the two main spiral arms in M51 (the inter-arm region) where ...
  • Side-gate leakage and field emission in all-graphene field effect transistors on SiO2/Si substrate 

    Di Bartolomeo, Antonio; Giubileo, Filippo; Iemmo, Laura; Romeo, Francesco; Russo, Saverio; Unal, Selim; Passacantando, Maurizio; Grossi, Valentina; Cucolo, Anna Maria (arXiv.org, 2016)
    We fabricate planar all-graphene field-effect transistors with self-aligned side-gates at 100 nm from the main graphene conductive channel, using a single lithographic step. We demonstrate side-gating below 1V with conductance ...
  • The signature of hot hydrogen in the atmosphere of the extrasolar planet HD 209458b 

    Ballester, G.; Sing, David K.; Herbert, Floyd (Nature Publishing Group, 2007)
    About ten per cent of the known extrasolar planets are gas giants that orbit very close to their parent stars. The atmospheres of these 'hot Jupiters' are heated by the immense stellar irradiation. In the case of the planet ...
  • Simple theory of hot electron dynamics observed by femtosecond ellipsometry 

    Kruglyak, V.V.; Hicken, R.J. (American Institute of Physics, 2006)
    The dynamics of the linear and angular momenta of hot electrons in metals are of key importance for the design and operation of hot electron devices such as spin and tunnel valve transistors. The corresponding relaxation ...
  • Simulation of orthotic treatment in adolescent idiopathic scoliosis using a subject-specific finite element model. 

    Vergari, C; Courtois, I; Ebermeyer, E; Bouloussa, H; Vialle, R; Skalli, W (Taylor & Francis, 2015-08-03)
    Adolescent idiopathic scoliosis (AIS) is a threedimensional deformity of the spine, often progressing rapidly during the growth spurt. Severe scoliosis can lead to significant degradation of quality of life and functional ...
  • Simulations of Dynamo Action in Fully Convective Stars 

    Browning, Matthew K. (American Astronomical Society / IOP Publishing, 2008)
    We present three-dimensional nonlinear magnetohydrodynamic simulations of the interiors of fully convective M dwarfs. Our models consider 0.3 solar-mass stars using the Anelastic Spherical Harmonic code, with the spherical ...