Photoluminescence in Er-doped Ge-As-Se chalcogenide thin films

hermal quenching of photoluminescence from Er-doped GaN thin films

The green (537 and 558 nm) and near infrared (1.54 mm) photoluminescence (PL) spectra of Er-doped GaN thin films have been investigated as a function of temperature, excitation wavelength, and pump intensity. Thermal quenching measurements showed that the 31 4 2 4 integrated green Er PL intensity ( S / H → I ) remained nearly constant up to 150 K, but decreased at higher temperatures 3 / 2 11 /...

Optical properties of spin-coated Er-doped Ga1As39S60 Chalcogenide thin films

Spin-coating of Chalcogenide glasses is a cost-effective and flexible method to produce thin films applicable in photonics. In this paper Er was doped into Ga1As39S60 glass by melt quenching technique and solutions for spin coating were prepared from glass powders dissolved in Propylamine and Ethylendiamine. Substrates used were microscopic slides (refractive index of about 1.51). Applied layer...

Modified Gibbs-DiMarzio equation applied to the Ge-Se-Fe and Ge-Se-In chalcogenide glasses

The glass transition is a complex, non-equilibrium physical phenomenon and despite the numerous efforts expended in the last three decades, the mechanisms governing the glass transition continue to raise a lot of fundamental questions. Its study is of extreme importance from both academic and technological points of view. Several theoretical models have been developed to improve our understandi...

Thin Ge–Se films as a sensing material for radiation doses

This work focuses on the study of Ge rich phases in the Ge–Se chalcogenide glass system. Radiation induced effects particularly related to Ag diffusion in the glasses under the influence of different doses of g radiation are investigated and documented. Raman spectroscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy, and atom force microscopy confirmed ...

Gamma radiation induced effects in floppy and rigid Ge-containing chalcogenide thin films