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Proceedings Paper

Plasmonic biosensing with nanoimprint binary grating using ellipsometry
Author(s): Rakesh Singh Moirangthem; Mohammad Tariq Yaseen; Yia-Chung Chang; Pei-Kuen Wei
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Paper Abstract

An optical label free and high sensitivity plasmonic biosensor using nanoimprint metallic binary grating is presented based on the phase information of the ellipsometry signal. Plasmonic binary grating was prepared by using soft nanoimprinting technique which significantly reduce the fabrication cost and can be realized for a transition from a laboratory-scale method to full-scale technology. The bulk sensitivity measurement from this 1D binary metallic grating gives a value of refractive index resolution of 1.06×10-7 RIU. Such a highly sensitive plasmonic biochip was used to investigate the adsorption of bio-molecules on the nanostructure surface in dynamic mode by monitoring the change in polarization state or phase of reflected light in the ellipsometry measurement as a sensing signal.

Paper Details

Date Published: 12 September 2011
PDF: 6 pages
Proc. SPIE 8099, Biosensing and Nanomedicine IV, 80990P (12 September 2011); doi: 10.1117/12.892868
Show Author Affiliations
Rakesh Singh Moirangthem, Academia Sinica (Taiwan)
National Tsing Hua Univ. (Taiwan)
Mohammad Tariq Yaseen, Academia Sinica (Taiwan)
National Tsing Hua Univ. (Taiwan)
Yia-Chung Chang, Academia Sinica (Taiwan)
Pei-Kuen Wei, Academia Sinica (Taiwan)

Published in SPIE Proceedings Vol. 8099:
Biosensing and Nanomedicine IV
Hooman Mohseni; Massoud H. Agahi; Manijeh Razeghi, Editor(s)

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