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Optics Letters

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  • Vol. 36, Iss. 6 — Mar. 15, 2011
  • pp: 945–947

A terahertz polarization insensitive dual band metamaterial absorber

Yong Ma, Qin Chen, James Grant, Shimul C. Saha, A. Khalid, and David R. S. Cumming  »View Author Affiliations


Optics Letters, Vol. 36, Issue 6, pp. 945-947 (2011)
http://dx.doi.org/10.1364/OL.36.000945


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Abstract

Metamaterial absorbers have attracted considerable attention for applications in the terahertz range. In this Letter, we report the design, fabrication, and characterization of a terahertz dual band metamaterial absorber that shows two distinct absorption peaks with high absorption. By manipulating the periodic patterned structures as well as the dielectric layer thickness of the metal–dielectric–metal structure, significantly high absorption can be obtained at specific resonance frequencies. Finite-difference time-domain modeling is used to design the structure of the absorber. The fabricated devices have been characterized using a Fourier transform IR spectrometer. The experimental results show two distinct absorption peaks at 2.7 and 5.2 THz , which are in good agreement with the simulation. The absorption magnitudes at 2.7 and 5.2 THz are 0.68 and 0.74, respectively.

© 2011 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.5750) Optical devices : Resonators
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:
Optical Devices

History
Original Manuscript: December 7, 2010
Revised Manuscript: February 4, 2011
Manuscript Accepted: February 14, 2011
Published: March 10, 2011

Citation
Yong Ma, Qin Chen, James Grant, Shimul C. Saha, A. Khalid, and David R. S. Cumming, "A terahertz polarization insensitive dual band metamaterial absorber," Opt. Lett. 36, 945-947 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-6-945


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