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Proceedings Paper

Plasmonic enhancement of a whispering-gallery-mode biosensor for single nanoparticle detection in aqueous solution
Author(s): S. I. Shopova; R. Rajmangal; S. Holler; S. Arnold
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Paper Abstract

We describe and demonstrate a physical mechanism that substantially enhances the label-free sensitivity of a Whispering-Gallery-Mode biosensor for the detection of individual nanoparticles in aqueous solution. It involves the interaction of dielectric nanoparticle in an equatorial carousel orbit with a plasmonic nanoparticle bound on the orbital path. As a 60 nm dielectric particle parks on plasmonic hot spots we observe frequency shifts that are considerably enhanced consistent with a simple reactive model. Using the same model the label free detection of a single bovine serum albumin (BSA) molecule is projected.

Paper Details

Date Published: 19 May 2012
PDF: 6 pages
Proc. SPIE 8376, Photonic Microdevices/Microstructures for Sensing IV, 837605 (19 May 2012); doi: 10.1117/12.920614
Show Author Affiliations
S. I. Shopova, Polytechnic Institute of New York Univ. (United States)
R. Rajmangal, Polytechnic Institute of New York Univ. (United States)
S. Holler, Polytechnic Institute of New York Univ. (United States)
Fordham Univ. (United States)
S. Arnold, Polytechnic Institute of New York Univ. (United States)

Published in SPIE Proceedings Vol. 8376:
Photonic Microdevices/Microstructures for Sensing IV
Xudong Fan; Hai Xiao; Anbo Wang, Editor(s)

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