Abstract

The reflectance of an absorbing medium Rθ(ϕ) for incident light of an arbitrary state of polarization is considered as a function of the compex dielectic constant ɛ; ϕ is the angle incidence and θ is an incident polarization parameter, for which cos2θ and sin2θ give the power fractions of incident radiation that are p- and s-polarized, respectively. Our objective is to explore the complex ɛ-plane and define the domains for which the different types of Rθ(ϕ) vs ϕ curves (monotonic, single minimum, and secondary maximum and minimum) occur. An ethanolic solution of Rhodamine B, an organic laser dye luminofor with a well-defined resonance absorption spectrum, was chosen as the absorbing medium. We were able to define the criteria for three distinctly different types of behavior of Rθ(ϕ).

© 1990 Optical Society of America

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