Now showing items 151-170 of 477

  • Flow-Induced Twist-Compression in a Twisted Nematic Cell 

    Ruan, Lizhen; Sambles, J. Roy (American Physical Society, 2003)
    An optical convergent-beam guided-wave technique is used to explore in detail the dynamic flow effects in a twisted nematic cell. During switch-on it is found that the dynamic flow compresses the director twist to regions ...
  • Fluorescence enhancement through modified dye molecule absorption associated with the localized surface plasmon resonances of metallic dimers 

    Zoriniants, George; Barnes, William L. (Institute of Physics and Deutsche Physikalische Gesellschaft, 2008)
    Nano-antennae consisting of gold particle dimers were fabricated by electron-beam lithography. Dark-field scattering spectroscopy was used to probe the plasmonic response of individual nano-antennae and to characterize the ...
  • Fluorescent dyes as a probe for the localized field of coupled surface plasmon-related resonances 

    Kreiter, M.; Neumann, T.; Mittler, S.; Knoll, W.; Sambles, J. Roy (American Physical Society, 2001)
    The fluorescence light of Cy5 dye molecules in the vicinity of a metal grating is studied for varying directions of both the exciting and the emitted light. A different angular dependence of the intensity of the emitted ...
  • Franck-Condon blockade in suspended carbon nanotube quantum dots 

    Leturcq, Renaud; Stampfer, Christoph; Inderbitzin, Kevin; Durrer, Lukas; Hierold, Christofer; Mariani, Eros; Schultz, Maximilian G.; von Oppen, Felix; Ensslin, Klaus (Nature Publishing Group, 2009)
    Understanding the influence of vibrational motion of the atoms on electronic transitions in molecules constitutes a cornerstone of quantum physics, as epitomized by the Franck-Condon principle of spectroscopy. Recent ...
  • The fresnel interferometric imager 

    Koechlin, Laurent; Serre, Denis; Deba, Paul; Pello, Roser; Peillon, Christelle; Duchon, Paul; Gomez de Castro, Ana Ines; Karovska, Margarita; Desert, J.-M.; Ehrenreich, D.; Hebrard, G.; Lecavelier des Etangs, A.; Ferlet, R.; Sing, David K.; Vidal-Madjar, A. (Springer Verlag, 2009)
    The Fresnel Interferometric Imager has been proposed to the European Space Agency (ESA) Cosmic Vision plan as a class L mission. This mission addresses several themes of the CV Plan: Exoplanet study, Matter in extreme ...
  • A gamma-ray burst at a redshift of z approximate to 8.2 

    Tanvir, N.R.; Fox, D.B.; Levan, A.J.; Berger, E.; Wiersema, K.; Fynbo, J.P.U.; Cucchiara, A.; Kruehler, T.; Gehrels, N.; Bloom, J.S.; Greiner, J.; Evans, P.A.; Rol, E.; Olivares, F.; Hjorth, J.; Jakobsson, P.; Farihi, J.; Willingale, R.; Starling, R.L.C.; Cenko, S.B.; Perley, D.; Maund, J.R.; Duke, J.; Wijers, R.A.M.J.; Adamson, A.J.; Allan, A.; Bremer, M.N.; Burrows, D.N.; Castro-Tirado, A.J.; Cavanagh, B.; de Ugarte Postigo, A.; Dopita, M.A.; Fatkhullin, T.A.; Fruchter, A.S.; Foley, R.J.; Gorosabel, J.; Kennea, J.; Kerr, T.; Klose, S.; Krimm, H.A.; Komarova, V.N.; Kulkarni, S.R.; Moskvitin, A.S.; Mundell, C.G.; Naylor, Tim; Page, K.; Penprase, B.E.; Perri, M.; Podsiadlowski, P.; Roth, K.; Rutledge, R.E.; Sakamoto, T.; Schady, P.; Schmidt, B.P.; Soderberg, A.M.; Sollerman, J.; Stephens, A.W.; Stratta, G.; Ukwatta, T.N.; Watson, D.; Westra, E.; Wold, T.; Wolf, C. (Nature Publishing Group, 2009)
  • Gas accretion on to planetary cores: Three-dimensional self-gravitating radiation hydrodynamical calculations 

    Ayliffe, Benjamin A.; Bate, Matthew R. (Oxford University Press / Royal Astronomical Society, 2009)
    We present results from three-dimensional, self-gravitating radiation hydrodynamical models of gas accretion by planetary cores. In some cases, the accretion flow is resolved down to the surface of the solid core – the ...
  • General relativity in electrical engineering 

    Leonhardt, Ulf; Philbin, Thomas G. (Institute of Physics, 2006)
    In electrical engineering metamaterials have been developed that offer unprecedented control over electromagnetic fields. Here we show that general relativity lends the theoretical tools for designing devices made of such ...
  • Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: Detection of potassium in XO-2b from narrowband spectrophotometry 

    Sing, David K.; Desert, J.-M.; Fortney, J.J.; Lecavelier des Etangs, A.; Ballester, G.; Cepa, J.; Ehrenreich, D.; Lopez-Morales, M.; Pont, F.; Shabram, M.; Vidal-Madjar, A. (EDP Sciences, 2011)
    We present Gran Telescopio Canarias (GTC) optical transit narrowband photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This unique instrument has the capabilities to deliver high-cadence narrowband ...
  • Grating-coupled surface plasmons at microwave frequencies 

    Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R. (American Institute of Physics, 1999)
    This work presents a detailed investigation of electromagnetic coupling to the surface plasmon-polariton (SPP) at microwave frequencies. We have recorded the wavelength-dependent reflectivity from a metallic sinusoidal ...
  • Gratingless enhanced microwave transmission through a subwavelength aperture in a thick metal plate 

    Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R. (American Institute of Physics, 2002)
    Remarkably enhanced transmission of microwave radiation through a single subwavelength slit in a thick metallic substrate surrounded by just a pair of parallel deep and narrow grooves is recorded. By also patterning the ...
  • Grazing-incidence iridescence from a butterfly wing 

    Lawrence, Christopher R.; Vukusic, Peter; Sambles, J. Roy (Optical Society of America, 2002)
    The Troides magellanus butterfly exhibits a specialized iridescence that is visible only when its hind wings are both illuminated and viewed at near-grazing incidence. The effect is due to the presence of a constrained ...
  • Ground-based photometry of space-based transit detections: photometric follow-up of the CoRoT mission 

    Deeg, H. J.; Gillon, M.; Shporer, A.; Rouan, D.; Stecklum, B.; Aigrain, Suzanne; Alapini, Aude; Almenara, J.-M.; Alonso, R.; Barbieri, M.; Bouchy, F.; Eislöffel, J.; Erikson, A.; Fridlund, M.; Eigmüller, P.; Handler, G.; Hatzes, A.; Kabath, P.; Lendl, M.; Mazeh, T.; Moutou, C.; Queloz, D.; Rauer, H.; Rabus, M.; Tingley, B.; Titz, R. (EDP Sciences, 2009)
    The motivation, techniques and performance of the ground-based photometric follow-up of transit detections by the CoRoT space mission are presented. Its principal raison d'être arises from the much higher spatial resolution ...
  • Ground-based secondary eclipse detection of the very-hot Jupiter OGLE-TR-56b 

    Sing, David K.; Lopez-Morales, M. (EDP Sciences, 2009)
    We report on the detection of the secondary eclipse of the very-hot Jupiter OGLE-TR-56b from combined z'-band time series photometry obtained with the VLT and Magellan telescopes. We measure a flux decrement of 0.0363 ± ...
  • GTC OSIRIS transiting exoplanet atmospheric survey: detection of potassium in HAT-P-1b from narrow-band spectrophotometry 

    Wilson, Paul A.; Sing, David K.; Nikolov, N.; Lecavelier des Etangs, A.; Pont, F.; Fortney, J.J.; Ballester, G.; Desert, J.-M.; Vidal-Madjar, A. (Oxford University Press for Royal Astronomical Society, 2015-04-15)
    We present the detection of potassium in the atmosphere of HAT-P-1b using optical transit narrow-band photometry. The results are obtained using the 10.4-m Gran Telescopio Canarias together with the OSIRIS instrument in ...
  • GTC OSIRIS transiting exoplanet atmospheric survey: Detection of sodium in XO-2b from differential long-slit spectroscopy 

    Sing, David K.; Huitson, Catherine M.; Lopez-Morales, M.; Pont, F.; Desert, J.-M.; Ehrenreich, D.; Wilson, Paul A.; Ballester, G.; Fortney, J.J.; Lecavelier des Etangs, A.; Vidal-Madjar, A. (Oxford University Press on behalf of the Royal Astronomical Society, 2012)
    We present two transits of the hot-Jupiter exoplanet XO-2b using the Gran Telescopio Canarias (GTC). The time series observations were performed using long-slit spectroscopy of XO-2 and a nearby reference star with the ...
  • Hawking radiation and the boomerang behaviour of massive modes near a horizon 

    Jannes, Gil; Maissa, Philippe; Philbin, Thomas G.; Rousseaux, Germain (American Physical Society, 2011)
    We discuss the behaviour of massive modes near a horizon based on a study of the dispersion relation and wave packet simulations of the Klein-Gordon equation. We point out an apparent paradox between two (in principle ...
  • Hawking tunneling and boomerang behaviour of massive particles with E < m 

    Jannes, Gil; Philbin, Thomas G.; Rousseaux, Germain (American Institute of Physics, 2012)
    Massive particles are radiated from black holes through the Hawking mechanism together with the more familiar radiation of massless particles. For E ≥ m, the emission rate is identical to the massless case. But E < m ...
  • Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths 

    Parke, L.; Hooper, Ian R.; Hicken, R.J.; Dancer, C.E.J.; Grant, P.S.; Youngs, I.J.; Sambles, J. Roy; Hibbins, Alastair P. (American Institute of Physics (AIP), 2013)
    A cold-pressing technique has been developed for fabricating composites composed of a polytetrafluoroethylene-polymer matrix and a wide range of volume-fractions of MnZn-ferrite filler (0%–80%). The electromagnetic properties ...
  • The Herschel and JCMT Gould belt surveys: Constraining dust properties in the Perseus B1 clump with PACS, SPIRE, and SCUBA-2 

    Sadavoy, S.I.; Di Francesco, J.; Johnstone, D.; Currie, M.J.; Drabek, E.; Hatchell, Jennifer; Nutter, D.; André, P.; Arzoumanian, D.; Benedettini, M.; Bernard, J-P.; Duarte-Cabral, A.; Fallscheer, C.; Friesen, R.; Greaves, J.; Hennemann, M.; Hill, T.; Jenness, T.; Könyves, V.; Matthews, B.C.; Mottram, J.C.; Pezzuto, S.; Roy, A.; Rygl, K.; Schneider-Bontemps, N.; Spinoglio, L.; Testi, L.; Tothill, N.; Ward-Thompson, D.; White, G.J. (American Astronomical Society / IOP Publishing, 2013)
    We present Herschel observations from the Herschel Gould Belt Survey and SCUBA-2 science verification observations from the JCMT Gould Belt Survey of the B1 clump in the Perseus molecular cloud. We determined the dust ...