CHALCOGENIDE GLASSES FOR OPTICAL AND PHOTONICS APPLICATIONS

摘要

A short review of relevant parameters, such as phonon energy, transmission range and refraction index, that distinguish previously and presently studied chaicogenide glasses from silica based ones is given. Chaicogenide glass systems GeSe, GeSeTe and As2Se;) have been prepared and characterized by absorption speclroscopy and low-temperature photoluminescence. Both absorption and low-temperature photoluminescence spectra reveal shifts of absorption edge and/or luminescence band to longer wavelength due to Te ~" Se substitution, Luminescence band shows little change with increasing temperature up to 200 K and considerable shift to shorter wavelength appears when room temperature is approached. No influence of Te Se substitution on the position or spectral shape of luminescence band is observed at room temperature.