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Proceedings Paper

Theoretical investigation on multilayer nanocomposite-based fiber optic SPR sensor
Author(s): Ehsan Shojaie; Khosro Madanipour; Azadeh Gharibzadeh; Shabnam Abbasi
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Paper Abstract

In this work, a multilayer nanocomposite based fiber optic SPR sensor is considered and especially designed for CO2 gas detection. This proposed fiber sensor consists of fiber core, gold-silver alloy and the absorber layers. The investigation is based on the evaluation of the transmitted-power derived under the transfer matrix method and the multiple-reflection in the sensing area. In terms of sensitivity, the sensor performance is studied theoretically under various conditions related to the metal layer and its gold and silver nanoparticles to form a single alloy film. Effect of additional parameters such as the ratio of the alloy composition and the thickness of the alloy film on the performance of the SPR sensor is studied, as well. Finally, a four-layer structure is introduced to detect carbon dioxide gas. It contains core fiber, gold-silver alloy layer, an absorbent layer of carbon dioxide gas (KOH) and measurement environment. Lower price and size are the main advantages of using such a sensor in compare with commercial (NDIR) gas sensor. Theoretical results show by increasing the metal layer thickness the sensitivity of sensor is increased, and by increasing the ratio of the gold in alloy the sensitivity is decreased.

Paper Details

Date Published: 26 June 2017
PDF: 8 pages
Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103301N (26 June 2017); doi: 10.1117/12.2270286
Show Author Affiliations
Ehsan Shojaie, Amirkabir Univ. of Technology (Iran, Islamic Republic of)
Khosro Madanipour, Amirkabir Univ. of Technology (Iran, Islamic Republic of)
Azadeh Gharibzadeh, Graduate Univ. of Advanced Technology - Kerman (Iran, Islamic Republic of)
Shabnam Abbasi, Amirkabir Univ. of Technology (Iran, Islamic Republic of)

Published in SPIE Proceedings Vol. 10330:
Modeling Aspects in Optical Metrology VI
Bernd Bodermann; Karsten Frenner; Richard M. Silver, Editor(s)

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