Record number :
Title of article :
Effect of pressure on luminescence properties of Sm3+ ions in potassium niobate tellurite glass
Author/Authors :
C.K. Jayasankar، نويسنده , , K. Upendra Kumar، نويسنده , , V. Venkatramu، نويسنده , , G. P. Babu، نويسنده , , Th. Tr?ster، نويسنده , , W. Sievers، نويسنده , , G. Wortmann، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
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Abstract :
Emission spectra and decay properties of the 4G5/2 level of Sm3+ ions in TeO2+K2O+Nb2O5 glass have been measured as a function of pressure upto 14.6 GPa at room temperature. A progressive red shift in the barycentres of 4G5/2→6HJ (J=9/2, 7/2 and 5/2) emission bands and increase in splitting of these bands have been observed with increasing pressure. The luminescence decay profile of the 4G5/2 level at ambient condition shows a nearly single exponential nature and with increase in pressure it becomes gradually non-exponential associated with a decrease in lifetime. The non-exponential decay curves are well-fitted to the Inokuti–Hirayama model for S=6, indicating that the interaction for cross-relaxation energy transfer between Sm3+ ions is of dipole–dipole type. The results obtained after release of pressure reveal that there is a small hysteresis.
Keywords :
Crystal field , energy transfer , Samarium , Tellurite glass , high pressure , Luminescence
Journal title :
Journal of Luminescence
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