Parameters inversion of ZnS multi-phonon absorption model based on the transmissivities in variable temperature.

In order to solve the difficulty of characterizing the optical constants of ZnS at high temperatures, the multi-phonon absorption dielectric function model which includes temperature parameters is constructed and modified in this paper. The multi-phonon absorption parameters of ZnS have been inverted based on variable temperature infrared transmittance spectra. The variable temperature infrared transmittance spectra of ZnS have been well fitted. The temperature dependence of the dissociation energy of ZnS materials is demonstrated, and the optical constants of the ZnS material have been obtained at 25 °C, 100 °C, 200 °C, 300 °C, and 400 °C. • The relationship between the value of m max and temperature is established in the multi-phonon absorption model of ZnS. • The ZnS multi-phonon parameters for various temperatures obtained by spectral inversion conform to physical laws. • Highly accurate variable-temperature optical constants of ZnS were obtained based on the multi-phonon absorption model. [ABSTRACT FROM AUTHOR]