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Thin Films

Highly absorbing nano-scale metal films for terahertz applications

[+] Author Affiliations
Fabio Alves

Naval Postgraduate School, Department of Physics, Monterey, California 93943

Apostolos Karamitros

Naval Postgraduate School, Department of Physics, Monterey, California 93943

Dragoslav Grbovic

Naval Postgraduate School, Department of Physics, Monterey, California 93943

Brian Kearney

Naval Postgraduate School, Department of Physics, Monterey, California 93943

Gamani Karunasiri

Naval Postgraduate School, Department of Physics, Monterey, California 93943

Opt. Eng. 51(6), 063801 (May 16, 2012). doi:10.1117/1.OE.51.6.063801
History: Received January 17, 2012; Revised March 21, 2012; Accepted April 12, 2012
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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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Fabio Alves ; Apostolos Karamitros ; Dragoslav Grbovic ; Brian Kearney and Gamani Karunasiri
"Highly absorbing nano-scale metal films for terahertz applications", Opt. Eng. 51(6), 063801 (May 16, 2012). ; http://dx.doi.org/10.1117/1.OE.51.6.063801


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