Structural and time resolved emission spectra of Er3+: Silver lead borate glass

The structural properties of Er3+: silver lead borate glass is assessed by means of SEM, X-ray mapping, EDS and Raman analysis. In order to verify the time dependency of emission spectra, steady-state luminescence spectroscopy (SSLS) and time-resolved emission spectroscopy (TRES) studies have been performed. The stimulated emission cross-sections for the NIR emission transition 4I13/2 → 4I15/2 (1535 nm) at 970 nm excitation are reported. The decay times were obtained by fitting one (τm = 0.301 ms) and two (τm1 = 0.141 ms, τm2 = 0.368 ms) distributions for the NIR transition. Furthermore, by making use of TRES measurements the decay associated spectra were obtained allowing the time dependency for the different emission bands to be elucidated.

Decay associated spectra, showing the spectra obtained for lifetimes of (a) 19 μs, (b) 70 μs, (c) 218 μs and (d) comparison, for Er3+: silver lead borate glass.74Highlights► Er3+: silver lead borate glass has been prepared and characterized. ► Excitation sources, at 370 nm and 970 nm, were used for luminescence studies. ► A broader NIR emission transition (4I13/2 → 4Il5/2) was observed. ► SSLS and TRES studies have been performed. ► Emission spectra profile is time dependent.