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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 21 — Oct. 8, 2012
  • pp: 24002–24009

Tunable dual-band perfect absorbers based on extraordinary optical transmission and Fabry-Perot cavity resonance

H. Y. Zheng, X. R. Jin, J. W. Park, Y. H. Lu, Joo Yull Rhee, W. H. Jang, H. Cheong, and Y. P. Lee  »View Author Affiliations

Optics Express, Vol. 20, Issue 21, pp. 24002-24009 (2012)

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Magnetic resonance is considered to be a necessary condition for metamaterial perfect absorbers, and dual-band absorbers can be composed of a pair of metallic layers with anti-parallel surface currents. We designed and fabricated a tunable dual-band perfect absorber based on extraordinary-optical-transmission (EOT) effect and Fabry-Perot cavity resonance. The idea and the mechanism are completely different from the absorber based on the near-field interaction. The important advantage of our structure is that we can switch a single-band absorber to a dual-band absorber by changing the distance between two metallic layers and/or incident angle. The peak originating from the EOT effect becomes significantly narrower, resulting in an increase of the Q-factor from 16.88 to 49. The dual-band absorber can be optimized to be insensitive to the polarization of the incident electromagnetic wave by slightly modifying the absorber structure.

© 2012 OSA

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(160.3918) Materials : Metamaterials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:

Original Manuscript: July 12, 2012
Revised Manuscript: September 2, 2012
Manuscript Accepted: September 18, 2012
Published: October 4, 2012

H. Y. Zheng, X. R. Jin, J. W. Park, Y. H. Lu, Joo Yull Rhee, W. H. Jang, H. Cheong, and Y. P. Lee, "Tunable dual-band perfect absorbers based on extraordinary optical transmission and Fabry-Perot cavity resonance," Opt. Express 20, 24002-24009 (2012)

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