Abstract

A general expression for the Goos–Hänchen lateral shift of a Gaussian wave beam, applicable for incident angle θ equal to, near, or larger than the critical angle θ_c, is obtained. It yields finite and smooth results around θ_c and coincides with Artmann’s classical result otherwise. Another expression for the lateral shift of a different beam-field distribution is also obtained and shown to be quite similar to that of the Gaussian beam. Comparisons with an existing theoretical expression and with available experimental data (for θ ≃ θ_c) are made. Discussion of a different expression for θ away from θ_c obtained through an energy method is also presented.

© 1986 Optical Society of America

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