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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 26 — Dec. 22, 2008
  • pp: 21271–21281

The role of leaky plasmon waves in the directive beaming of light through a subwavelength aperture

D. R. Jackson, J. Chen, R. Qiang, F. Capolino, and A. A. Oliner  »View Author Affiliations


Optics Express, Vol. 16, Issue 26, pp. 21271-21281 (2008)
http://dx.doi.org/10.1364/OE.16.021271


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Abstract

We show that the enhanced directivity phenomenon for light passing through a subwavelength aperture in a silver film with corrugations on the exit face, is due to a leaky wave that decays exponentially from the aperture. We show quantitatively that the field along the interface of the silver film is dominated by the leaky wave, and that the radiation of the leaky wave, supported by the periodic structure, yields the directive beam. The leaky wave propagation and attenuation constants parameterize the physical radiation mechanism, and provide important design information for optimizing the structure. Maximum directivity occurs when the phase and attenuation constants are approximately equal

© 2008 Optical Society of America

OCIS Codes
(240.5420) Optics at surfaces : Polaritons
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Optics at Surfaces

History
Original Manuscript: October 27, 2008
Revised Manuscript: November 29, 2008
Manuscript Accepted: November 30, 2008
Published: December 9, 2008

Citation
D. R. Jackson, J. Chen, R. Qiang, F. Capolino, and A. A. Oliner, "The role of leaky plasmon waves in the directive beaming of light through a subwavelength aperture," Opt. Express 16, 21271-21281 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-26-21271


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References

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