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Proceedings Paper

Terahertz metamaterials perfect absorbers for sensing and imaging
Author(s): David S. Wilbert; Mohammad P. Hokmabadi; Joshua Martinez; Patrick Kung; Seongsin M. Kim
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Paper Abstract

Devices operating at THz frequencies have been continuously expanded in many areas of application and major research field, which requires materials with suitable electromagnetic responses at THz frequency ranges. Unlike most naturally occurring materials, novel THz metamaterials have proven to be well suited for use in various devices due to narrow and tunable operating ranges. In this work, we present the results of two THz metamaterial absorber structures aiming two important device aspects; polarization sensitivity and broad band absorption. The absorbers were simulated by finite element method and fabricated through the combination of standard lift-off photolithography and electron beam metal deposition. The fabricated devices were characterized by reflection mode THz time domain spectroscopy. The narrow band absorber structures exhibit up to 95% absorption with a bandwidth of 0.1 THz to 0.15 THz.

Paper Details

Date Published: 23 February 2013
PDF: 6 pages
Proc. SPIE 8585, Terahertz and Ultrashort Electromagnetic Pulses for Biomedical Applications, 85850Y (23 February 2013); doi: 10.1117/12.2005709
Show Author Affiliations
David S. Wilbert, Univ. of Alabama (United States)
Mohammad P. Hokmabadi, Univ. of Alabama (United States)
Joshua Martinez, Univ. of Alabama (United States)
Patrick Kung, Univ. of Alabama (United States)
Seongsin M. Kim, Univ. of Alabama (United States)

Published in SPIE Proceedings Vol. 8585:
Terahertz and Ultrashort Electromagnetic Pulses for Biomedical Applications
Gerald J. Wilmink; Bennett L. Ibey, Editor(s)

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