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调谐激光晶体Cr3+:ZnWO4光致发光特性的研究

陈伟 夏上达 汤洪高 刘竟青 臧竟存 万寿科

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调谐激光晶体Cr3+:ZnWO4光致发光特性的研究

陈伟, 夏上达, 汤洪高, 刘竟青, 臧竟存, 万寿科

PHOTOLUMINESCENCE PROPERTIES OF TUNABLE LASER CRYSTAL Cr3+:ZnWO4

CHEN WEI, XIA SHANG-DA, TANG HONG-GAO, LIU JING-QING, ZANG JING-CUN, WAN SHOU KE
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  • 研究了调谐激光晶体Cr3+:ZnWO4的光致发光特性。报道了它的吸收光谱、激发光谱、发射光谱及其随温度的变化、零声子跃迁和发射寿命等实验结果,并讨论了激发特性、电子-声子耦合作用、ZnWO4中Cr3+的发射寿命曲线等相关问题。
    We investigate the photoluminescence properties of Cr3+:ZnWO4 single crystals which channels all the fluorescence into the broadband 4T2(t22e) to 4A2(t32) transition at about 990nm wavelength. Experiment results of the absorption spectra and the excitation spectrum, temperature dependence of the emission spectra, decay curves of Cr3+ ions are presented and discussed. The most efficient excitation wavelength is in the red region. Radiative decay from the luminescence level to the ground level is characterized by broad emission bands as a consequence of a strong electron-phonon interaction ——Hua-Rhys factor S(300K)=4.22, S(12.7K) = 7.09, the average pho-non energy hv(300K)=405cm-1, hv(12.7K)=213cm-1. The zero-phonon transition line probably is at wavelength of 856.7nm. If there are two kinds of Cr3+ center, one is compensated by the adjacent vacancy(1.8μs), and the other is compersated nonl-ocally (5.45μs).
    • 基金项目: 国家自然科学基金资助的课题.
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  • 文章访问数:  6589
  • PDF下载量:  676
  • 被引次数: 0
出版历程
  • 收稿日期:  1993-03-30
  • 刊出日期:  1994-05-20

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