Abstract

When the reflected or transmitted field of a frustrated total internal reflection is returned along its path to the point of incidence, it produces a third auxiliary field. When any combination of two of the three fields is returned along their respective paths to the point of incidence, interference-enhanced frustrated total internal reflection (IEFTIR) occurs. Exact IEFTIR solutions are obtained for the case of two similar dielectric slabs separated by a dielectric gap. The general results include, for both <i>s</i> and <i>p</i> polarizations, the transmitted and reflected fields and the transmission and reflection coefficients for each of three posssible modes. Special features of the solution are discussed regarding fast optical switching and variable transmission/reflection applications.

© 1980 Optical Society of America

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