W A Murray

Publications (3)7.37 Total impact

• Source

  Available from: ex.ac.uk

  Article: Spontaneous emission from within a metal-clad cavity mediated by coupled surface plasmon–polaritons

  G Winter, W A Murray, S Wedge, W L Barnes
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  ABSTRACT: The emission of light from within a sub-wavelength metal-clad cavity is investigated. We find that emitters placed inside such a cavity emit into the coupled surface plasmon–polariton mode supported by this structure. We use grating structures to couple the non-radiative coupled surface plasmon–polariton modes to light and present the results of measurements of photoluminescence from such structures in the form of dispersion curves. We discuss our findings in the context of sub-wavelength cavities as a means to control the emission of light.
  J. Phys.: Condens. Matter. 01/2008; 20(304218).
• Article: Resonant absorption of electromagnetic fields by surface plasmons buried in a multilayered plasmonic nanostructure

  A. P. Hibbins, W. A. Murray, J. Tyler, S. Wedge, W. L. Barnes, J. R. Sambles
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  ABSTRACT: The optical reflectivity of a metal-dielectric-metal microcavity in which the upper layer is periodically perforated by narrow slits is explored. Complete characterization of the observed modes in terms of their resonant electromagnetic fields is achieved by comparison of the experimental data to the predictions of a finite-element model. In particular, we demonstrate that the slits provide efficient diffractive coupling to a surface plasmon mode buried within the microcavity whose propagation is strongly confined to the dielectric layer.
  Phys. Rev. B. 08/2006; 74(7).
• Source

  Available from: exeter.ac.uk

  Article: Surface plasmon polaritons and their role in the enhanced transmission of light through periodic arrays of subwavelength holes in a metal film.

  W L Barnes, W A Murray, J Dintinger, E Devaux, T W Ebbesen
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  ABSTRACT: We present results of the transmitted, reflected, and absorbed power associated with the enhanced transmittance of light through a silver film pierced by a periodic array of subwavelength holes. Comparing experimentally acquired dispersion curves under different polarization conditions shows that the transmission features of the array are consistent with p-polarized resonant modes of the structure. By exploring the regime in which no propagating diffracted orders are allowed, we further show that the transmittance maxima are associated with both reflectance minima and absorption maxima. These new results provide strong experimental evidence for transmission based on diffraction, assisted by the enhanced fields associated with surface plasmon polaritons.
  Physical Review Letters 04/2004; 92(10):107401. · 7.37 Impact Factor