Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses.

ABSTRACT: A facile procedure for compositional screening of chalcogenide glass (CG) is proposed to manage its infrared transmission edge (ω_c) as well as refractive index dispersion (ν) in the long-wavelength infrared (LWIR) range. Both ω_c and ν of CG turn out to be interpretable simply in connection with its chemical composition based on a postulation that CG behaves as a single average harmonic oscillator (SAHO). In this SAHO model, ω_c is expressed as a function of molar mass and average bond energy, both of which are easily accessible for a given CG composition. Two prototypical CG-forming systems in Ge-Sb-Se and Ge-Sb-S compositions exemplify the empirical compositional dependence of ω_c, which further plays a decisive role in determining ν. Following th

SUBMITTER: Lee JH 

PROVIDER: S-EPMC6195534 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature