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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 10 — May. 12, 2008
  • pp: 7181–7188

A metamaterial absorber for the terahertz regime: Design, fabrication and characterization

Hu Tao, Nathan I. Landy, Christopher M. Bingham, Xin Zhang, Richard D. Averitt, and Willie J. Padilla  »View Author Affiliations


Optics Express, Vol. 16, Issue 10, pp. 7181-7188 (2008)
http://dx.doi.org/10.1364/OE.16.007181


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Abstract

We present a metamaterial that acts as a strongly resonant absorber at terahertz frequencies. Our design consists of a bilayer unit cell which allows for maximization of the absorption through independent tuning of the electrical permittivity and magnetic permeability. An experimental absorptivity of 70% at 1.3 terahertz is demonstrated. We utilize only a single unit cell in the propagation direction, thus achieving an absorption coefficient α=2000 cm-1. These metamaterials are promising candidates as absorbing elements for thermally based THz imaging, due to their relatively low volume, low density, and narrow band response.

© 2008 Optical Society of America

OCIS Codes
(160.1890) Materials : Detector materials
(260.5740) Physical optics : Resonance
(040.2235) Detectors : Far infrared or terahertz
(160.3918) Materials : Metamaterials
(050.6624) Diffraction and gratings : Subwavelength structures
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Metamaterials

History
Original Manuscript: March 12, 2008
Revised Manuscript: April 25, 2008
Manuscript Accepted: April 29, 2008
Published: May 2, 2008

Citation
Hu Tao, Nathan I. Landy, Christopher M. Bingham, Xin Zhang, Richard D. Averitt, and Willie J. Padilla, "A metamaterial absorber for the terahertz regime: design, fabrication and characterization," Opt. Express 16, 7181-7188 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-10-7181


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