Abstract

We study the output from the modes described by the superposition of Gaussian beams confined in the quasi- stadium microcavities. We experimentally observe the deviation from Snell’s law in the output when the incident angle of the Gaussian beam at the cavity interface is near the critical angle for total internal reflection, providing direct experimental evidence on the Fresnel filtering. The theory of the Fresnel filtering for a planar interface qualitatively reproduces experimental data, and a discussion is given on small deviation between the measured data and the theory.

© 2011 Optical Society of America

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