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Proceedings Paper

Coupled surface plasmon resonance sensor with sensitive liquid crystal layer
Author(s): Alaeddin S Abu-Abed; Shadi A. Alboon; Yongbin Lin; Robert G. Lindquist
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Paper Abstract

This paper presents an optical sensor based on the surface plasmon resonance (SPR) phenomenon, involved with liquid crystal (LC) sensitive layer. This sensor has potential applications in chemical and biological systems. We present a tracking method for the state of alignment and degree of ordering of the partially ordered LC film. This can be achieved via the SPR propagation constant and the critical angle at the interface between a metal and an LC film. The proposed idea is also investigated experimentally. For this purpose, we fabricated gold nano-dots array on an optical fiber tip for localized SPR sensing. The spectral position of the maximum loss in the transmission spectra depends on the refractive index of the medium surrounding the sensor fiber tips. This allows for tracking the LC profile parameters.

Paper Details

Date Published: 2 February 2011
PDF: 7 pages
Proc. SPIE 7955, Emerging Liquid Crystal Technologies VI, 79550Q (2 February 2011); doi: 10.1117/12.876299
Show Author Affiliations
Alaeddin S Abu-Abed, Univ. of Central Oklahoma (United States)
Shadi A. Alboon, Yarmouk Univ. (Jordan)
Yongbin Lin, The Univ. of Alabama in Huntsville (United States)
Robert G. Lindquist, The Univ. of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 7955:
Emerging Liquid Crystal Technologies VI
Liang-Chy Chien; Hiroshi Yokoyama, Editor(s)

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