Near-infrared broadband luminescence and energy transfer in Bi-Tm-Er co-doped lanthanum aluminosilicate glasses

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• 作者：Tran Minh Hau^a ; ^b ; Rongfei Wang^a ; Xue Yu^a ; Dacheng Zhou^a ; Zhiguo Song^a ; Zhengwen Yang^a ; Xijia He^a ; Jianbei Qiu^a ; ^{qiu@kmust.edu.cn}
• 关键词：A. Glass ; D. Luminescence
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2012
• 期刊代码：69_00223697
• 类别：ch
• 出版时间：September, 2012
• 卷：73
• 期：9
• 页码：1182-1186
• 文件大小：415 K

摘要

The Bi-Tm-Er co-doped SiO₂-Al₂O₃-La₂O₃ (SAL) glasses, which exhibited a broadband near-infrared (NIR) emission, were investigated by the optical absorption and photoluminescence spectra. A super broadband NIR emission extending from 0.95 to 1.6 渭m with a full-width at half-maximum (FWHM) of 430 nm which covered the whole O, E, S, C and L bands, was observed in Bi-Tm-Er co-doped samples under 808 nm excitation, as a result of the overlap of the Bi-related emission band (centered at 1270 nm) and the emission from Tm^{3+ 3}H₄鈫?sup>3F₄ transition (1450 nm) as well as Er^{3+ 4}I_13/2鈫?sup>4I_15/2 transition (1545 nm). In addition, a super broadband emission with amplitude relatively flat from 0.95 to 2.1 渭m has been observed. The possible energy transfer between Bi-related centers, Tm³⁺ ions and Er³⁺ ions was proposed.