کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11019659 | 1717625 | 2019 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectroscopic investigations of Sm3+doped phosphate glasses: Judd-Ofelt analysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Phosphate glasses with chemical compositions of (42- x/2) P2O5-(42- x/2)Na2O-15ZnO-xSm2O3 were synthetized by melt quenching method. We investigated the influence of Sm3+ doping on the optical properties of phosphate glasses. X-Ray Diffraction indicates that the samples have an amorphous structure. DSC measurements show a good thermal stability of phosphate glasses. Using the absorption spectra, Judd-Ofelt analysis was applied to absorption bands of Sm3+ (4f5) to carry out the three phenomenological parameters of Judd-Ofelt (JO). According to the obtained values of Ω2, Ω4 and Ω6, some radiative properties were theoretically determined. Photoluminescence (PL) spectra show three transitions of Sm3+: 4G5/2â¯ââ¯6H5/2 (600â¯nm), 4G5/2â¯ââ¯6H7/2 (564â¯nm) and 4G5/2â¯ââ¯6H9/2 (645â¯nm). The concentration dependency of PL intensity was investigated. The quenching of the PL intensity occurs at the Sm3+ concentration above 1%. The predicted lifetime (Ïr) calculated by using JO method and the measured lifetime (Ïmea) determined experimentally for 4G5/2 level, were discussed and compared with those of other works. With the weak spectroscopic quality factors Ω4/Ω6 (0.76), we expect a relatively prominent infrared laser emission.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 552, 1 January 2019, Pages 184-189
Journal: Physica B: Condensed Matter - Volume 552, 1 January 2019, Pages 184-189
نویسندگان
H. Largot, K.E. Aiadi, M. Ferid, S. Hraiech, C. Bouzidi, C. Charnay, K. Horchani-Naifer,