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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 36, Iss. 23 — Dec. 1, 2011
  • pp: 4584–4586

Plasmonic critical angle in optical transmission through subwavelength metallic gratings

Zhonghua Wang, Guangyuan Li, Feng Xiao, Fan Lu, Kun Li, and Anshi Xu  »View Author Affiliations


Optics Letters, Vol. 36, Issue 23, pp. 4584-4586 (2011)
http://dx.doi.org/10.1364/OL.36.004584


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Abstract

We observe and theoretically analyze the plasmonic analog of the critical angle phenomenon in optical transmission through subwavelength gratings milled in an optically thick metal film. The total transmission from a denser medium to a less dense one vanishes while the total reflection holds very strong, providing the incidence angle increases past the plasmonic critical angle (PCA). The conditions and physical origins of the total internal reflection above the PCA are clarified.

© 2011 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: July 27, 2011
Revised Manuscript: October 16, 2011
Manuscript Accepted: October 19, 2011
Published: November 25, 2011

Citation
Zhonghua Wang, Guangyuan Li, Feng Xiao, Fan Lu, Kun Li, and Anshi Xu, "Plasmonic critical angle in optical transmission through subwavelength metallic gratings," Opt. Lett. 36, 4584-4586 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-23-4584


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