Abstract

For light reflection at a planar interface between two homogeneous isotropic media with complex relative dielectric function , we show that the constant-principal-angle contours are a family of semicircles, whereas the constant-principal-azimuth contours are a family of (segments of) hyperbolas in the complex plane. We also find the exact envelope curve of both families and hence determine the domain of the plane of multiple (three) principal angles that is bougded by the envelope curve and the real axis. A unique and peculiar interface with =(5-j2)/27 is shown to have three coincident principal angles of 30° and an associated curve of relative phase shift (Δ) versus angle of incidence that exhibits a distinct shoulder at the principal angle.

© 1981 Optical Society of America

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