Optical properties of chalcogenide glasses in the terahertz spectral region
Optical properties of chalcogenide glasses of three different compositions (As2S3, As2S3 × As2Se3, and As2Se3) are studied via terahertz pulsed spectroscopy. Absorption coefficients and refractive indices are measured in a frequency range of 0.2–1.6 THz. The results show that the phonon modes of the studied materials vary with the composition of the glasses.