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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 9 — Apr. 28, 2008
  • pp: 6619–6624

Enhanced transmission mediated by guided resonances in metallic gratings coated with dielectric layers

Fengqin Wu, Dezhuan Han, Xin Li, Xiaohan Liu, and Jian Zi  »View Author Affiliations


Optics Express, Vol. 16, Issue 9, pp. 6619-6624 (2008)
http://dx.doi.org/10.1364/OE.16.006619


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Abstract

Transmission properties of metallic gratings coated symmetrically with a dielectric layer on both sides are studied theoretically. For subwavelength narrow slits, besides cavity resonances in slits and surface plasmon-polaritons, a new kind of mechanisms for enhanced transmission in coated metallic gratings, namely, guided resonances in the dielectric coating layers, is found. Transmission peaks mediated by guided resonances are found to be much sharper than those mediated by cavity or surface plasmon-polariton resonances.

© 2008 Optical Society of America

OCIS Codes
(310.2790) Thin films : Guided waves
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Thin Films

History
Original Manuscript: March 6, 2008
Revised Manuscript: April 21, 2008
Manuscript Accepted: April 21, 2008
Published: April 24, 2008

Citation
Fengqin Wu, Dezhuan Han, Xin Li, Xiaohan Liu, and Jian Zi, "Enhanced transmission mediated by guided resonances in metallic gratings coated with dielectric layers," Opt. Express 16, 6619-6624 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-9-6619


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