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Proceedings Paper

Plasmonic sensing of hydrogen in Pd nano-hole arrays
Author(s): Hoang Mai Luong; Minh Thien Pham; George Keefe Larsen; Tho Duc Nguyen
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Paper Abstract

The optical properties in visible – near infrared range of Pd nano-hole arrays (PNA) and Pd thin films under hydrogen absorption – desorption processes have been investigated. The PNA samples show plasmonic resonances with about three times more transmission than that of the Pd thin film samples with a similar thickness. Remarkably, due to the plasmonic effect the PNA samples exhibit two times larger transmission change, normalized to the Pd cover area, under the hydrogen absorption/desorption processes at the Wood’s anomaly positions. The PNA sample can be used as a hydrogen sensor that has a better signal-to-noise ratio than the one based on the corresponding Pd thin film. The experimental results are confirmed by the finite-difference time domain (FDTD) calculations.

Paper Details

Date Published: 9 September 2019
PDF: 6 pages
Proc. SPIE 11082, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVII, 110821D (9 September 2019); doi: 10.1117/12.2529302
Show Author Affiliations
Hoang Mai Luong, The Univ. of Georgia (United States)
Minh Thien Pham, The Univ. of Georgia (United States)
George Keefe Larsen, Savannah River National Lab. (United States)
Tho Duc Nguyen, The Univ. of Georgia (United States)

Published in SPIE Proceedings Vol. 11082:
Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVII
Din Ping Tsai; Takuo Tanaka, Editor(s)

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