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Proceedings Paper

A novel biosensor based on a coupled surface plasmon nanostructure
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Paper Abstract

A novel plasmonic biosensor based on coupled metal-dielectric buffer grating is proposed and analyzed by the rigorous coupled wave analysis (RCWA) method. The metal-dielectric buffer grating structure offers surface plasmon resonance suitable for high sensitivity biosensing applications. The calculated FWHW (full width at half maximum) of the transmission peak is 5 nm and the optical transmission efficiency is significantly enhanced at the resonant wavelength of 800.8 nm by introducing the dielectric buffer grating. The highly concentrated field distribution is sensitive to surrounding refractive index changes of the metal surface providing a sensitivity of 560 nm/RIU (refractive index unit) for optical biosensing applications.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84215R (7 November 2012); doi: 10.1117/12.975005
Show Author Affiliations
Youqiao Ma, Dublin Institute of Technology (Ireland)
Gerald Farrell, Dublin Institute of Technology (Ireland)
Yuliya Semenova, Dublin Institute of Technology (Ireland)
H. P. Chan, City Univ. of Hong Kong (Hong Kong, China)
Qiang Wu, Dublin Institute of Technology (Ireland)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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