Highly absorbing nano-scale metal films for terahertz applications

Fabio Alves; Apostolos Karamitros; Dragoslav Grbovic; Brian T. Kearney; Gamani Karunasiri

doi:10.1117/1.OE.51.6.063801

16 May 2012 Highly absorbing nano-scale metal films for terahertz applications

Fabio Alves, Apostolos Karamitros, Dragoslav Grbovic, Brian T. Kearney, Gamani Karunasiri

Author Affiliations +

Optical Engineering, Vol. 51, Issue 6, 063801 (May 2012). https://doi.org/10.1117/1.OE.51.6.063801

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.

Citation Download Citation

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

Published: 16 May 2012

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