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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 9 — Sep. 26, 2007

Plasmon resonance microsensor for droplet analysis

M. Chaigneau, K. Balaa, T. Minea, and G. Louarn  »View Author Affiliations


Optics Letters, Vol. 32, Issue 16, pp. 2435-2437 (2007)
http://dx.doi.org/10.1364/OL.32.002435


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Abstract

Microscale fiber tip sensors based on the plasmon resonance are reported. The fabrication process derived from our previous approach for manufacturing near-field scanning optical microscopy probes has been optimized for sensing applications. A typical tip sensor is a tapered fiber 400 μ m in length, coated with a nanoporous thin silver film. The miniaturized geometry of the sensor allows detection in a single droplet of liquid solution ( 20 μ l ) . The tip sensor is sensitive for refractive indices between 1.33 and 1.40 with a sensitivity of at least 3 × 10 4 refractive index unit (RIU) nm . The Raman scattering enhancement through these microsensors demonstrates the important role played by the localized plasmon resonance. The sensors' linear response covers a large region, interesting for biosensing in aqueous environments such as biomedical applications.

© 2007 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 25, 2007
Revised Manuscript: July 3, 2007
Manuscript Accepted: July 14, 2007
Published: August 8, 2007

Virtual Issues
Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Citation
M. Chaigneau, K. Balaa, T. Minea, and G. Louarn, "Plasmon resonance microsensor for droplet analysis," Opt. Lett. 32, 2435-2437 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-32-16-2435

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