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Proceedings Paper

Optimized design of a nanocomposite Ta2O5 and Pd multilayer OFSPR H2 sensor: a theoretical analysis
Author(s): F. Downes; C. M. Taylor
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Paper Abstract

For the first time, we perform a theoretical investigation into the operation of a multilayer nanocomposite based optical fibre surface plasmon resonance hydrogen sensor. The sensor consists of Pd nanoparticles embedded in host material of Ta2O5 over a thin continuous film of Ag, in place of a small unclad section of the fibre core. We compare the operation of this device to a sensor employing an individual multilayer based sensing stack (Ag/Ta2O5/Pd) by measuring the normalised output power through the fibre, and the sensor sensitivity. A much smaller modulation layer thickness is required in the NC structure in order to achieve the same spectral shift of the resonance location as compared to the IM based structure, thus indicating a faster response time. In both sensor types, sensitivity increased to a maximum with increasing modulation material thickness, beyond which it began to fall off. The NC based structure operated with overall higher sensitivity than the IM structure.

Paper Details

Date Published: 16 February 2017
PDF: 7 pages
Proc. SPIE 10100, Optical Components and Materials XIV, 101000S (16 February 2017); doi: 10.1117/12.2252038
Show Author Affiliations
F. Downes, Institute of Technology Sligo (Ireland)
C. M. Taylor, Institute of Technology Sligo (Ireland)

Published in SPIE Proceedings Vol. 10100:
Optical Components and Materials XIV
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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