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Grating-coupled surface plasmons at microwave frequencies

J. Appl. Phys. 86, 1791 (1999); doi:10.1063/1.370970

Issue Date: 15 August 1999

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A. P. Hibbins and J. R. Sambles
Thin Film Photonics Group, School of Physics, University of Exeter, Exeter, EX4 4QL, England

C. R. Lawrence
Defence Evaluation and Research Agency, Farnborough GU14 0LX, England
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 diffraction grating of pitch 15 mm. In order to minimize the problems associated with nonplanar incident wavefronts, we have developed an apparatus that collimates the incident beam. We illustrate resonant coupling to the SPP at wavelengths of the order of 10 mm. The wavelength-dependent reflectivities recorded have been successfully fitted using a differential formalism of conical diffraction with a single set of grating parameters describing the grating profile and metal permittivity. ©1999 American Institute of Physics.
History: Received 17 November 1998; accepted 26 April 1999
Permalink: http://link.aip.org/link/?JAPIAU/86/1791/1
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KEYWORDS and PACS

Keywords
PACS
  • 73.20.Mf
    Electronic structure and electrical properties of surfaces, interfaces, and thin films Surface and interface electron states Collective excitations (including plasmons and other charge-density excitations)
  • 71.36.+c
    Electronic structure Polaritons (including photon–phonon and photon–magnon interactions)
  • 78.70.Gq
    Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter Interactions of particles and radiation with matter Microwave and radio-frequency interactions
  • YEAR: 1999

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ISSN:
0021-8979 (print)   1089-7550 (online)
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