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Title: Prism dispersion effects in near-guided-wave surface plasmon resonance sensors
Authors: Shalabney, Atef
Abdulhalim, Ibrahim
Keywords: DRNTU::Engineering::Materials
Issue Date: 2012
Source: Shalabney, A., & Abdulhalim, I. (2012). Prism dispersion effects in near-guided-wave surface plasmon resonance sensors. Annalen der Physik, 524(11), 680-686.
Series/Report no.: Annalen der physik
Abstract: Refractive index dispersion causes the light line to curve. As a result it is shown that when the prism is dispersive, an additional dip in the spectral response of Surface Plasmon Resonance (SPR) sensors is observed in the Kretschmann-Raether (KR) configuration. Since the new dip evolves in the infrared (IR) region, it exhibits a high sensitivity to the analyte refractive index (RI) changes and the mode penetrates deeper into the analyte. Adding a thin dielectric layer with high refractive index on top of the metallic layer enables to control the dip location and strength. The two dips shift in opposite directions as the analyte RI changes and therefore when the spectral difference is considered as the measurand, higher RI sensitivity is obtained. The dispersion relation of two thin films bounded by two semi-infinite media is derived when the prism dispersion is considered.
ISSN: 0003-3804
DOI: 10.1002/andp.201200138
Rights: © 2012 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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