title: Temperature dependent luminescence characteristics of Sm3+-doped silicate glass.
abstract: We report here on the optical characterisation of Sm3+ (5 wt%): SiO2 + Al2O3 + Li2O + Na2O + MgO glass from the measurements of optical absorption spectra (at 300 K), total luminescence spectra (10-300 K) and fluorescence lifetimes (10-300 K) of the prominent emission transitions of the Sm3+ ions. Besides its spectral properties, physical and nonlinearity characterising property parameters have also been computed to understand the optical dispersive power of this glass. By the application of Judd-Ofelt parameters (omega(lambda)) of the measured absorption spectrum, the radiative transition probability factors (A) and stimulated emission cross-section (sigma(p)E) of the observed fluorescent levels have been analysed. Both emission intensity and measured lifetimes of the prominent luminescent transition (4G(5/2) --> 6H(7/2)) concerning Sm3+-glass has been showing a descending trend with the rise in temperature with N2-laser (337.1 nm) as the source of excitation.
authors.affiliation: Glass Technology Section, Central Glass & Ceramic Research Institute, Calcutta, India.
authors.forename: K
authors.initials: K
authors.lastname: Annapurna
authors.forename: R N
authors.initials: RN
authors.lastname: Dwivedi
authors.forename: A
authors.initials: A
authors.lastname: Kumar
authors.forename: A K
authors.initials: AK
authors.lastname: Chaudhuri
authors.forename: S
authors.initials: S
authors.lastname: Buddhudu
mesh_terms: D005898:Glass / Q000737:chemistry*; D049449:Luminescence; D008956:Models, Chemical; D012493:Samarium / Q000737:chemistry; D017640:Silicates / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D013054:Spectrophotometry, Atomic; D013696:Temperature; D014055:Tomography, Emission-Computed
chemical_list: D017640:Silicates; D012493:Samarium