Optimized design of a nanocomposite Ta2O5 and Pd multilayer OFSPR H2 sensor: a theoretical analysis

F. Downes; C. M. Taylor

doi:10.1117/12.2252038

16 February 2017 Optimized design of a nanocomposite Ta₂O₅ and Pd multilayer OFSPR H₂ sensor: a theoretical analysis

F. Downes, C. M. Taylor

Proceedings Volume 10100, Optical Components and Materials XIV; 101000S (2017) https://doi.org/10.1117/12.2252038
Event: SPIE OPTO, 2017, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

F. Downes and C. M. Taylor "Optimized design of a nanocomposite Ta₂O₅ and Pd multilayer OFSPR H₂ sensor: a theoretical analysis", Proc. SPIE 10100, Optical Components and Materials XIV, 101000S (16 February 2017); https://doi.org/10.1117/12.2252038

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