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Bulletin of the American Physical Society

Exploring asymmetry in the optical dispersion of dyes in solution near an absorption resonance

Amelia G. VanEngen Spivey

Published Oct 20, 2012• 0 citations
OpenAlex

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We discuss the results of experimental studies of competition of absorption and scattering of laser radiation propagating in dispersive media with resonant absorption. As media under study, use is made of a suspension of polystyrene particles in solutions of rhodamine 6G in ethylene glycol probed by laser light with a wavelength of 532 nm. It is found that an increase in the dye concentration leads to an increase in optical transmittance of suspensions and an increase in speckle modulation of the forward-scattered radiation. We interpret these features as a manifestation of Christiansen effect in disperse systems with resonance absorption.