外文题目: Charge state and energy transfer investigation of iron-chromium co-doped ZnS polycrystalline prepared by step-temperature diffusion for mid-infrared laser applications
作者: Wang, XiangYong; Chen, Zhe; Zhang, Lianhan; Xu, Min; Chen, Guangzhu; Jiang, Benxue; Ke, Changjun; Zhang, Long; Hang, Yin
刊名: J. Alloy. Compd.
年: 2017 卷: 695 页： 3767--3771
英文关键词:
Charge state; Energy transfer; Cr,Fe:ZnS polycrystalline; Mid-IR laser materials
II-VI COMPOUNDS; 2.5 MU-M; ZINC CHALCOGENIDES; BULK ZNSE; SPECTROSCOPY; CR2+; PHOTOLUMINESCENCE; LUMINESCENCE; ABSORPTION; CR2+-ZNSE
英文摘要:
The spectroscopic characterization and energy transfer mechanism of iron-chromium co-doped ZnS polycrystalline (Cr,Fe:ZnS) were reported with dimension of 10 mm x 10 mm x 1.5 mm produced by step-temperature thermal diffusion method. The infrared absorption is characterized by two absorption broad-bands centered at 1.67 mu m and 2.9 mu m which can be attributed to the spin-allowed transition T-5(2) <-> E-5 within the 3 d(4) shell of Cr2+ and Fe2+ ions. The valences of iron and chromium in ZnS were analyzed by X-ray photoelectron spectroscopy. Photoluminescence spectrum shows a relatively strong broad emission band centered at 4 mu m with a width of 800 nm (FWHM) under 1.56 mu m excitation at room temperature and reveals an effective Cr2+ -> Fe2+ energy transfer process. The measured photoluminescence decay was about 5 mu s at room temperature. All the results indicate that Cr, Fe: ZnS could be used as the gain medium operating at 3.5-4.5 mu m via Cr2+ -> Fe2+ energy transfer using a more convenient laser pump source in the near IR region. (C) 2016 Elsevier B.V. All rights reserved.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1016/j.jallcom.2016.11.145


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