SPR-leaky-mode spectroscopy with polymer films for optical chemosensors

R. P. Podgorsek; U. Sandten; Hilmar Franke

doi:10.1117/12.323508

25 September 1998 SPR-leaky-mode spectroscopy with polymer films for optical chemosensors

R. P. Podgorsek, U. Sandten, Hilmar Franke

Proceedings Volume 3417, Photopolymer Device Physics, Chemistry, and Applications IV; (1998) https://doi.org/10.1117/12.323508
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

Abstract

The optical reflectivity of multilayers consisting of a metal layer of about 50 nm and a dielectric layer in the thickness range of an optical waveguide gives rise to different resonances. In the metal layer the surface plasmon (SPR) may be excited while in the dielectric layer waveguide resonances can be observed, when the resonance conditions are fulfilled. Resonance spectra can be obtained by varying the angle of incidence with monochromatic light or by varying the wavelength at a constant angle of incidence. The evaluation of the resonance light or by varying the wavelength at a constant angle of incidence. The evaluation of the resonance spectra allows the determination of all the involved optical parameters of the multilayer like layer thicknesses and real and imaginary parts of the refractive indices. Using polymer films in the position of the dielectric films the whole set of interactions of thin polymer films with the surrounding environment. This makes the method interesting for optical sensor devices. Depending on the particular interest low price, compact and selective methods of monitoring in situ processes may be realized based on the combination of the SPR-leaky technique.

Citation Download Citation

R. P. Podgorsek, U. Sandten, and Hilmar Franke "SPR-leaky-mode spectroscopy with polymer films for optical chemosensors", Proc. SPIE 3417, Photopolymer Device Physics, Chemistry, and Applications IV, (25 September 1998); https://doi.org/10.1117/12.323508

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