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Optical Engineering

Surface plasmon resonance structures in spectral interrogation using high refractive index prism materials for sensing of different amino acids
Author(s): Sharmila Ghosh; Mina Ray
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Paper Abstract

A prism coupler-based nano-plasmonic sensor consisting of a high refractive index (RI) prism (2S2G-prism, LASF9-prism), gold (Au) metal film, and different amino acids as the dielectric sample is used for sensing in attenuated total internal reflection mode. An additional semiconductor (silicon) nano-layer over the gold surface has been used for increasing the stability and sensitivity of the surface plasmon resonance sensor. A comparative analysis of performance of the nano-plasmonic sensors in the spectral regime using these two high RI prism materials with an additional semiconductor nano-layer has been presented. The sensing performance of the proposed nano-plasmonic sensors in terms of evanescent field enhancement, spectral sensitivity, detection accuracy, figure of merit, and Q-factor with different amino acid samples has been discussed along with supporting theoretical simulations in a MATLAB® environment.

Paper Details

Date Published: 25 November 2014
PDF: 7 pages
Opt. Eng. 53(11) 117108 doi: 10.1117/1.OE.53.11.117108
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Sharmila Ghosh, Univ. of Calcutta (India)
Mina Ray, Univ. of Calcutta (India)

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