کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1486230 | 1510554 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cr3+ luminescence quenching in stoichiometric lithium niobate crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Cr3+ luminescence quenching in stoichiometric lithium niobate crystals Cr3+ luminescence quenching in stoichiometric lithium niobate crystals](/preview/png/1486230.png)
چکیده انگلیسی
Cr3+-doped stoichiometric LiNbO3 crystals were grown and detailed spectroscopic investigations were performed. The samples are characterized by extremely low frequency factor of the luminescence thermal quenching. Its numerical value 1.7 Ã 108 sâ1 is about 104 times lower than in crystals of lithium-aluminum fluorides. Under such conditions, radiative transitions of Cr3+ ions compete successfully with non-radiative ones, resulting in a relatively high quantum yield of the broadband luminescence at room temperature. The quenching of luminescence is counteracted by the effect of the dynamic removal of the radiative transition exclusion, and as a result, Cr3+ radiative lifetime in LiNbO3 decreases from 8 to 4 μs when temperature grows up from 77 to 300 K. Therefore quantum yield of the broadband luminescence at room temperature is not 5-10%, as reported previously, but about 30%. The results obtained in the present study show the stoichiometric lithium niobate doped with Cr3+ ions to be a potential active media for tunable lasers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 23â25, 15 July 2006, Pages 2395-2398
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 23â25, 15 July 2006, Pages 2395-2398
نویسندگان
V.V. Galutskiy, B.V. Ignatyev, V.A. Isaev, V.A. Lebedev, A.G. Avanesov, A.L. Mihaylenko, E.V. Stroganova, M.G. Brik,