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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 33 — Nov. 20, 2008
  • pp: 6177–6182

Absorption and related optical dispersion effects on the spectral response of a surface plasmon resonance sensor

Mohamed Nakkach, Pierre Lecaruyer, Fabrice Bardin, Jaouhar Sakly, Zohra Ben Lakhdar, and Michael Canva  »View Author Affiliations


Applied Optics, Vol. 47, Issue 33, pp. 6177-6182 (2008)
http://dx.doi.org/10.1364/AO.47.006177


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Abstract

Surface plasmon resonance (SPR) sensing is an optical technique that allows real time detection of small changes in the physical properties, in particular in the refractive index, of a dielectric medium near a metal film surface. One way to increase the SPR signal shift is then to incorporate a substance possessing a strong dispersive refractive index in the range of the plasmon resonance band. In this paper, we investigate the impact of materials possessing a strong dispersive index integrated to the dielectric medium on the SPR reflectivity profile. We present theoretical results based on chromophore absorption spectra and on their associated refractive index obtained from the Lorentz approach and Kramers– Krönig equations. As predicted by the theory, the experimental results show an enhancement of the SPR response, maximized when the chromophore absorption band coincides with the plasmon resonant wavelength. This shows that chromophores labeling can provide a potential way for SPR response enhancement.

© 2008 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(160.4760) Materials : Optical properties
(240.6680) Optics at surfaces : Surface plasmons
(310.6870) Thin films : Thin films, other properties
(310.6188) Thin films : Spectral properties

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: July 15, 2008
Manuscript Accepted: August 15, 2008
Published: November 13, 2008

Virtual Issues
Vol. 4, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Mohamed Nakkach, Pierre Lecaruyer, Fabrice Bardin, Jaouhar Sakly, Zohra Ben Lakhdar, and Michael Canva, "Absorption and related optical dispersion effects on the spectral response of a surface plasmon resonance sensor," Appl. Opt. 47, 6177-6182 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-33-6177

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