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Proceedings Paper

Sensitivity enhancement of surface plasmon resonance imaging sensor with structural parameter optimization based on polarization contrast modulation
Author(s): Yi Sun; Ya Gao; Tingting Yang; Xu Ma; Xiaoping Wang
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Paper Abstract

Abstracts A method, based on particle swarm optimization (PSO) and finite-difference time-domain (FDTD) simulation, is proposed to optimize micro-well structural parameter of SPRi sensor with polarization contrast modulation. According to PSO algorithm, these six structural parameters are optimized. Following that, the electromagnetic field characteristics of the gold micro-well structure involving the background gold film thickness are simulated and optimized by FDTD. It is proved that the sensitivity of the optimized structure is four times higher than the traditional one, which shows the practicability of the home-built SPRi sensor, in addition, as a result of the high signal-to-noise ratio, the refractive index resolution of the sensor is two order of the magnitude lower. Besides that, optimization algorithm provides a new way for other SPR sensor optimization.

Paper Details

Date Published: 24 April 2018
PDF: 5 pages
Proc. SPIE 10712, Optical Manipulation Conference, 107121D (24 April 2018); doi: 10.1117/12.2318588
Show Author Affiliations
Yi Sun, Zhejiang Univ. (China)
Ya Gao, Zhejiang Univ. (China)
Tingting Yang, Zhejiang Univ. (China)
Xu Ma, Zhejiang Univ. (China)
Xiaoping Wang, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 10712:
Optical Manipulation Conference
Takashige Omatsu; Hajime Ishihara; Keiji Sasaki, Editor(s)

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