Abstract
Far infrared (12–235 cm -1 reflectivity data for GaAs and CdTe have been fitted equally well with the usual two-oscillator dielectric function and Kukharskii's generalized form ϵ K . Kukharskii's extended Lyddane—Sachs—Teller relation was confirmed and the quantities appearing in ϵ K agreed fairly well with other determinations. ϵ K was used to analyze the damped plasmon-phonon modes.
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