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Proceedings Paper

Ceramic surface polariton sensor
Author(s): Carl-Gustaf Ribbing; Oerjan Staaf
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Paper Abstract

The feasibility of an alternative surface polariton sensor is demonstrated. Existing surface plasmon resonance (SPR-) sensors use the surface of a thin metal film as detector. The critical condition for this excitation is a large negative real part of the dielectric function (epsilon) 1((omega) ), which is characteristic for good metals in the visible and near UV range. This condition is also fulfilled in the infrared region for many compounds with partly ionic binding. Multilayer calculations are used to show that a ceramic film can be used as a sensor surface. In the calculations, the Kretschmer configuration is used to demonstrate the excitation of a surface polarion beyond the critical angle of incidence, sensitive to minute changes in refractive index near the free surface. Optimization with respect to film thickness and excitation wavelength within the Reststrahlen Band region is discussed.

Paper Details

Date Published: 11 October 2000
PDF: 10 pages
Proc. SPIE 4103, Optical Diagnostic Methods for Inorganic Materials II, (11 October 2000); doi: 10.1117/12.403585
Show Author Affiliations
Carl-Gustaf Ribbing, Defense Research Establishment (Sweden)
Oerjan Staaf, Defense Research Establishment (Sweden)

Published in SPIE Proceedings Vol. 4103:
Optical Diagnostic Methods for Inorganic Materials II
Leonard M. Hanssen, Editor(s)

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