Abstract
The synthesis and optical properties of Nd3+-doped lead silicate glasses (SiO2-Na2O-Sb2O3- PbO2) were reported. The photoluminescence (PL) spectra in the range of 600 to 1100 nm reveal four well resolved emission bands, centered at (lambda) equals 810, 890, 920 and 1060 nm, respectively. In the dependence on the temperature, the PL line at the higher energy side exhibited a peculiar behavior, compared to that in the lower-energy side - a strong enhancement of PL intensity with an increase of temperature up to 300 K. It was well explained by the localized phonon-assisted energy transfer process in combination with thermal activation of Nd3+ by absorption of localized phonons. The build up in PL intensity of 810nm PL emission band with increasing temperature would be expected to have many practical applications, such as thermometer.
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