کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7899732 | 1510349 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced infrared-to-visible frequency upconversion in Yb3+/Er3+ codoped Bi2O3-GeO2 glasses with embedded silver nanoparticles
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
We report the enhanced infrared-to-visible frequency upconversion (UC) in Yb3+/Er3+ codoped Bi2O3-GeO2 (BGO) glasses prepared using the melt quenching technique, with low concentration of AgNO3. Silver nanoparticles (NPs) with average size around 4â¯nm were observed using a high resolution transmission electron microscope (HR-TEM). The experiments were performed by exciting the samples with 980â¯nm diode laser in resonance with the 2F5/2â¯ââ¯2F7/2 transition of Yb3+ ions. Emission bands were observed at 525, 545 and 655â¯nm that correspond to the following transitions of the infrared-to-visible frequency UC of Er3+: 2H11/2â¯ââ¯4I15/2, 4S3/2â¯ââ¯4I15/2 and 4F9/2â¯ââ¯4I15/2, respectively. Enhancement of the UC luminescence efficiency up to 100% was obtained, attributed to the simultaneous influence of the increased local field in the vicinity of the silver NPs and the contribution of the Yb3+â¯ââ¯Er3+ energy transfer; it was also observed that the largest enhancement occurred for the band centered at 525â¯nm whose transition wavelength is closer to the silver NPs localized surface plasmon (LSP) wavelength. This is the first time that these effects are investigated for a bismuth germanate glass and demonstrate that Yb3+/Er3+ codoped BGO glasses with silver NPs can be used as efficient luminescent nanocomposite material for photonics applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 498, 15 October 2018, Pages 395-400
Journal: Journal of Non-Crystalline Solids - Volume 498, 15 October 2018, Pages 395-400
نویسندگان
L.R.P. Kassab, D.K. Kumada, D.M. da Silva, J.A.M. Garcia,