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Optical Engineering

Highly absorbing nano-scale metal films for terahertz applications
Author(s): Fabio Alves; Apostolos Karamitros; Dragoslav Grbovic; Brian T. Kearney; Gamani Karunasiri
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Paper Abstract

Our work aims to identify nano-scale metal films with enhanced absorption in the terahertz (THz) spectral range (1 to 10 THz) that can be incorporated in thermal imagers that operate in this spectral band. Absorption measurements of chromium and nickel films with different thicknesses (2.5 to 50 nm) revealed that absorption as high as 47% can be achieved by controlling the thickness of the film. The measured absorption agrees well with the predicted maximum absorption of 50% using thin metal films. The results indicate that nanometer scale metal films can provide high THz absorption for applications in thermal sensing.

Paper Details

Date Published: 16 May 2012
PDF: 7 pages
Opt. Eng. 51(6) 063801 doi: 10.1117/1.OE.51.6.063801
Published in: Optical Engineering Volume 51, Issue 6
Show Author Affiliations
Fabio Alves, Naval Postgraduate School (United States)
Apostolos Karamitros, Naval Postgraduate School (United States)
Dragoslav Grbovic, Naval Postgraduate School (United States)
Brian T. Kearney, Naval Postgraduate School (United States)
Gamani Karunasiri, Naval Postgraduate School (United States)


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