A sensor based on the planar-polarization interferometer

We have successfully used a single-beam planar interferometer based on the silicon-silicon dioxide-silicon nitride-phosphosilicate glass multilayer structure. s- and p-polarizations of the same light beam are used as its individual arms. The high sensitivity of the device when serving as a refractometer and an immunosensor is demonstrated. The experimental results are shown to be in a good agreement with those calculated within the framework of a transverse synchronism. (C) 1998 Elsevier Science S.A. All rights reserved.