Abstract

An experimental investigation of spectral dependence of two recently discovered anomalies in deep metallic gratings is presented. Good coincidence with theoretical results is obtained. It is shown that the Brewster effect in deep gratings is suppressed with a decrease of wavelength, as the angle of incidence approaches zero. At the same time the groove-depth interval widens, and low values of reflectivity are observed.

© 1990 Optical Society of America

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