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Applied Optics

Applied Optics


  • Vol. 22, Iss. 21 — Nov. 1, 1983
  • pp: 3397–3405

Coupling between finite electromagnetic beam and long-range surface-plasmon mode

Robert T. Deck, Dror Sarid, Grieg A. Olson, and J. M. Elson  »View Author Affiliations

Applied Optics, Vol. 22, Issue 21, pp. 3397-3405 (1983)

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In this paper, we consider a layered structure consisting of dielectric, metal, and dielectric media and compute the fields produced in the structure by a finite width beam of incident radiation which couples to a long-range surface-plasmon mode in the metallic layer. The analysis allows for complex dielectric constants in all media and focuses on optical radiation. Curves are presented which show the profiles of the reflected field intensity for different values of the propagation length of the mode relative to the width of the incident beam. We discuss the conditions in which the field reradiated from the long-range surface mode can interfere with the specularly reflected radiation so as to produce an interference zero in the reflected profile. In these conditions our analysis allows for a determination of the separate loss coefficients of the mode associated with energy reradiation and dissipation, respectively

© 1983 Optical Society of America

Original Manuscript: June 2, 1983
Published: November 1, 1983

Robert T. Deck, Dror Sarid, Grieg A. Olson, and J. M. Elson, "Coupling between finite electromagnetic beam and long-range surface-plasmon mode," Appl. Opt. 22, 3397-3405 (1983)

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  11. The same equation can be obtained by solution of the coupled equations (44)′ and (45)′ in region x where B∼3(x) has the constant value A.
  12. For a complete lateral shift of the profile it is necessary that there be complete coupling of the incident radiation into the surface mode so that no specular reflection occurs at the trailing edge of the incident beam.

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