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Proceedings Paper

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

Our work aims to identify nano-scale metal films with enhanced absorption between 1 to 10 THz for use in thermal imagers operating in this spectral band. Absorption measurements of chromium and nickel films with different thicknesses (8 - 30 nm) revealed absorption as high as 40% (Cr) and 27% (Ni) between 3 and 9 THz. Further analysis showed that it is possible to optimize absorption by controlling conductivity of metal films by patterning them to reduce fill factor. This design flexibility allows tailoring of the absorbing layer to reduce residual stress of membranes used in microbolmeter and bi-material thermal sensors.

Paper Details

Date Published: 7 September 2011
PDF: 7 pages
Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190K (7 September 2011); doi: 10.1117/12.894088
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 Kearney, Naval Postgraduate School (United States)
Gamani Karunasiri, Naval Postgraduate School (United States)

Published in SPIE Proceedings Vol. 8119:
Terahertz Emitters, Receivers, and Applications II
Manijeh Razeghi; Nicolas Péré-Laperne; Henry O. Everitt; John M. Zavada; Tariq Manzur, Editor(s)

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