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Optics Letters

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  • Vol. 36, Iss. 8 — Apr. 15, 2011
  • pp: 1524–1526

Polarization insensitive terahertz metamaterial absorber

J. Grant, Y. Ma, S. Saha, L. B. Lok, A. Khalid, and D. R. S. Cumming  »View Author Affiliations


Optics Letters, Vol. 36, Issue 8, pp. 1524-1526 (2011)
http://dx.doi.org/10.1364/OL.36.001524


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Abstract

We present the simulation, implementation, and measurement of a polarization insensitive resonant metamaterial absorber in the terahertz region. The device consists of a metal/dielectric-spacer/metal structure allowing us to maximize absorption by varying the dielectric material and thickness and, hence, the effective electrical permittivity and magnetic permeability. Experimental absorption of 77% and 65% at 2.12 THz (in the operating frequency range of terahertz quantum cascade lasers) is observed for a spacer of polyimide or silicon dioxide respectively. These metamaterials are promising candidates as absorbing elements for thermally based terahertz imaging.

© 2011 Optical Society of America

OCIS Codes
(040.2235) Detectors : Far infrared or terahertz
(160.3918) Materials : Metamaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Materials

History
Original Manuscript: November 2, 2010
Revised Manuscript: March 3, 2011
Manuscript Accepted: March 24, 2011
Published: April 15, 2011

Citation
J. Grant, Y. Ma, S. Saha, L. B. Lok, A. Khalid, and D. R. S. Cumming, "Polarization insensitive terahertz metamaterial absorber," Opt. Lett. 36, 1524-1526 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-8-1524


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