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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 11 — Nov. 13, 2006

Surface plasmon resonance sensors based on uniform-waist tapered fibers in a reflective configuration

Óscar Esteban, Natalia Díaz-Herrera, María-Cruz Navarrete, and Agustín González-Cano  »View Author Affiliations

Applied Optics, Vol. 45, Issue 28, pp. 7294-7298 (2006)

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We present a configuration for surface plasmon resonance sensors based on uniform-waist tapered optical fibers and reflective elements. Once the fiber is tapered fulfilling the adiabatic criterion, a multilayer including a metallic medium is asymmetrically deposited on the uniform waist of the fiber. This feature provides the resonant excitation of multiple surface plasma waves. In addition, a mirror is produced at the fiber tip by a chemical Tollens reaction. In this way, the sensor operates in a reflective mode, more convenient for dip probes. When these sensors are spectrally interrogated, a high sensitivity of 10−4 refractive index units per nanometer is attained. These devices can be advantageously used for any kind of chemical sensing and biosensing.

© 2006 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:
Optics at Surfaces

Original Manuscript: February 21, 2006
Revised Manuscript: April 21, 2006
Manuscript Accepted: April 26, 2006

Virtual Issues
Vol. 1, Iss. 11 Virtual Journal for Biomedical Optics

Óscar Esteban, Natalia Díaz-Herrera, María-Cruz Navarrete, and Agustín González-Cano, "Surface plasmon resonance sensors based on uniform-waist tapered fibers in a reflective configuration," Appl. Opt. 45, 7294-7298 (2006)

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