کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803780 | 1516473 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Energy-transfer frequency upconversion in neodymium-sensitized praseodymium-doped PbGeO3-PbF2-CdF2 glass excited at 810Â nm
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Visible frequency upconversion emission through resonant energy-transfer involving neodymium and praseodymium ions in PbGeO3-PbF2-CdF2 glass excited by a semiconductor laser at 810 nm is investigated. Luminescence emission centered around 485, 530, 610, and 645 nm, which correspond to the 3P0 â 3H4, 3P1 + 1I6 â 3H5, 3P0 â 3H6 and 3P0 â 3F2 transitions of praseodymium ions, respectively, are observed. The upconversion excitation of the Pr3+ ions excited-state emitting levels was accomplished by means of an ion-pair interaction involving ground-state absorption, multiphonon relaxation, and excited-state absorption of pump photons at 810 nm by the Nd3+ (4I9/2 â 2H9/2, 4F5/2; 4F3/2 â 2P1/2) and direct energy-transfer to Pr3+ (4G11/2 + 2K11/2, 3H4 â 4I9/2, 3P1 + 1I6). The dependence of the upconversion emission intensity upon the excitation power, and neodymium concentration are also examined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 394, Issues 1â2, 17 May 2005, Pages 24-27
Journal: Journal of Alloys and Compounds - Volume 394, Issues 1â2, 17 May 2005, Pages 24-27
نویسندگان
A.S. Gouveia-Neto, E.B. da Costa, L.A. Bueno, Y. Messaddeq, S.J.L. Ribeiro,