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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Absorption and related optical dispersion effects on the spectral response of a surface plasmon resonance sensor
Applied Optics, Volume 47, No. 33, Year 2008
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Description
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-Kronig 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.
Authors & Co-Authors
Nakkach, Mohamed
France, Palaiseau
Laboratoire Charles Fabry
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Lecaruyer, Pierre
France, Palaiseau
Laboratoire Charles Fabry
Bardin, Fabrice
France, Palaiseau
Laboratoire Charles Fabry
Sakly, Jaouhar
Tunisia, Tunis
University of Carthage, Institut National Des Sciences Appliquées et de Technologie
Ben Lakhdar, Zohra
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Canva, Michael
France, Palaiseau
Laboratoire Charles Fabry
Statistics
Citations: 21
Authors: 6
Affiliations: 3
Identifiers
Doi:
10.1364/AO.47.006177
ISSN:
1559128X
e-ISSN:
15394522