Abstract
The excitation of nonlinear p-polarized surface electromagnetic waves (SEW) in prism-metal film-nematic liquid crystal (NLC) attenuated total reflection (ATR) systems (Kretschmann ATR system) has been investigated both theoretically and experimentally. The third-order optical nonlinearity of the NLC (the only nonlinear medium in our system) has been estimated by measuring the dependence of the reflectance minimum on the incident radiation intensity. The nonlinear optical method of determination of the thickness of thin metal films, used in the Kretschmann system, has been suggested. The hysteresis loops in the outgoing intensity versus input intensity curves were obtained experimentally when the light field increases and decreases consecutively.
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