Ceramic surface polariton sensor

Carl-Gustaf Ribbing; Oerjan Staaf

doi:10.1117/12.403585

11 October 2000 Ceramic surface polariton sensor

Carl-Gustaf Ribbing, Oerjan Staaf

Proceedings Volume 4103, Optical Diagnostic Methods for Inorganic Materials II; (2000) https://doi.org/10.1117/12.403585
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

Citation Download Citation

Carl-Gustaf Ribbing and Oerjan Staaf "Ceramic surface polariton sensor", Proc. SPIE 4103, Optical Diagnostic Methods for Inorganic Materials II, (11 October 2000); https://doi.org/10.1117/12.403585

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