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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 11 — Nov. 1, 2011
  • pp: 2827–2832

Exciting multiple plasmonic resonances by a double-layered metallic nanostructure

Yanxia Cui, Kin Hung Fung, Jun Xu, Jin Yi, Sailing He, and Nicholas X. Fang  »View Author Affiliations


JOSA B, Vol. 28, Issue 11, pp. 2827-2832 (2011)
http://dx.doi.org/10.1364/JOSAB.28.002827


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Abstract

By placing a metallic layer of a periodic nanostrip array above a metallic layer of a periodic nanogroove array with a separation of 120 nm , we obtain a triple-band thin film absorber with all its resonant wavelengths displaying absorptivity greater than 90%. Through a systematic study of the current compound structure, we find these three absorption peaks mainly depend on some simple resonances, i.e., the modes supported by the nanostrip array in the top layer, the nanogroove array in the bottom layer, and the horizontal cavity between the two layers. In addition, we show that this kind of absorber is quite robust and fairly insusceptible to the parallel shift between the two different layers. This study should contribute to the design of thin film absorbers/emitters.

© 2011 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: April 26, 2011
Revised Manuscript: September 12, 2011
Manuscript Accepted: September 30, 2011
Published: October 31, 2011

Citation
Yanxia Cui, Kin Hung Fung, Jun Xu, Jin Yi, Sailing He, and Nicholas X. Fang, "Exciting multiple plasmonic resonances by a double-layered metallic nanostructure," J. Opt. Soc. Am. B 28, 2827-2832 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-11-2827

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