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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 11 — Nov. 1, 2009
  • pp: 2362–2367

Electromagnetic fields and modal excitations on a thin silver film

J. Quinn Bagley, Boping Wu, and Leung Tsang  »View Author Affiliations


JOSA A, Vol. 26, Issue 11, pp. 2362-2367 (2009)
http://dx.doi.org/10.1364/JOSAA.26.002362


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Abstract

In this paper we extend the fast-all-modes method and the numerical modified steepest-descent-path method to the optical frequency range by finding all modes and solving the total electric field in three dimensions that is due to a point source above a lossy thin metal film with a negative permittivity situated between two dissimilar dielectric materials. We show that up to four proper surface wave modes may propagate on the film surface, including both backward and forward waves. We also solve for the electric field below the lossy thin metal film and verify the existence of superlensing of the electric field, comparing that case to the case of a dielectric film where no superlensing occurs. The CPU time using the fast-all-modes method and the numerical modified steepest-descent-path method is considerably less than that using the conventional method of integration along the Sommerfeld integration path.

© 2009 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

ToC Category:
Optics at Surfaces

History
Original Manuscript: April 23, 2009
Revised Manuscript: September 22, 2009
Manuscript Accepted: September 22, 2009
Published: October 15, 2009

Citation
J. Quinn Bagley, Boping Wu, and Leung Tsang, "Electromagnetic fields and modal excitations on a thin silver film," J. Opt. Soc. Am. A 26, 2362-2367 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-11-2362


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References

  1. J. Q. Bagley, B. Wu, and L. Tsang, “Electromagnetic fields of Hertzian dipoles in layered negative refractive index materials,” IEEE Antennas Wireless Propag. Lett. 7, 749-752 (2008). [CrossRef]
  2. L. Tsang and B. Wu, “Electromagnetic fields of Hertzian dipoles in layered media of moderate thickness including the effects of all modes,” IEEE Antennas Wireless Propag. Lett. 6, 316-319 (2007). [CrossRef]
  3. J. B. Pendry, “Negative refraction makes a perfect lens,” Phys. Rev. Lett. 85, 3966-3969 (2000). [CrossRef] [PubMed]
  4. N. Fang, Z. Liu, T.-J. Yen, and X. Zhang, “Regenerating evanescent waves from a silver superlens,” Opt. Express 11, 682-287 (2003). [CrossRef] [PubMed]
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  7. S. Durant, Z. Liu, J. M. Steele, and X. Zhang, “Theory of the transmission properties of an optical far-field superlens for imaging beyond the diffraction limit,” J. Opt. Soc. Am. B 23, 2383-2392 (2006). [CrossRef]
  8. T. Tamir and A. A. Oliner, “The spectrum of electromagnetic waves guided by a plasma layer,” Proc. IEEE 51, 317-332 (1963). [CrossRef]
  9. A.D.Boardman (editor), Electromagnetic Surface Modes (Wiley, 1982).
  10. H. Raether, Surface Plasmons on Smooth and Rough Surfaces and on Gratings (Springer-Verlag, 1988).

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