7 September 2011 Highly absorbing nano-scale metal films for terahertz
Author Affiliations +
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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fabio Alves, Apostolos Karamitros, Dragoslav Grbovic, Brian Kearney, Gamani Karunasiri, "Highly absorbing nano-scale metal films for terahertz", Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190K (7 September 2011); doi: 10.1117/12.894088; https://doi.org/10.1117/12.894088
PROCEEDINGS
7 PAGES


SHARE
Back to Top