| Ti：Al2O3晶体紫外及可见光谱的浓度效应研究 |
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| 引用本文： | 刘建华,祁长鸿.Ti：Al2O3晶体紫外及可见光谱的浓度效应研究[J].光学学报,1995,15(1):03-107. |
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| 作者姓名： | 刘建华 祁长鸿 |
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| 作者单位： | 中国科学院上海光学精密机械研究所 |
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| 摘 要： | 通过对不同浓度的Ｔｉ：Ａｌ２Ｏ３晶体紫外吸收光谱，可见偏振荧光光谱及其激发光谱的研究，发现峰值４２０ｎｍ的宽带可见荧光，室温下较强的σ偏振光在低温（７７Ｋ）下变得比π偏振光弱。在液氮温度下π偏振光谱分裂成３３０ｎｍ，４２０ｎｍ，４６０ｎｍ，５６０ｎｍ等离荧光带。研究认为，这些发光带分别与色心（Ｆ＾＋，Ｆ心）及Ｔｉ＾４＾＋离子的电荷转移跃适有关。并且室温下可见荧光具有的较强的浓度猝灭及现象来源于Ｔｉ
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| 关 键 词： | 掺钛氧化铝晶体 紫外光谱 可见光谱 浓度效应 |
| 收稿时间： | 1994/8/12 |
Investigations on the Concentration Dependent Ultraviolet and Visible Band Spectroscopies of Ti: Al_2O_3 Crystal |
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| Liu Jianhua, Qi Changhong,Deng Peizhen,Gan Fuxi.Investigations on the Concentration Dependent Ultraviolet and Visible Band Spectroscopies of Ti: Al_2O_3 Crystal[J].Acta Optica Sinica,1995,15(1):03-107. |
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| Authors: | Liu Jianhua Qi Changhong Deng Peizhen Gan Fuxi |
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| Abstract: | Concentration effect on the ultraviolet absorption spectrum, visible blueemndssion spectra and the corresPOndent excitation spectra of Ti: Al2O3 crystal had beeninvestigated. At liquid nitrogen temperature,the brosd 420 urn blue emission bandsplitted intO 330 um, 420 um, 460 um and 560 um sub-bands, which were attributedrespectively to the F+ and F centers of the host Al2O3 lattice and Ti4+ related chargetransfer transitions among ligsnds and metal ions. Concentration quenching of the blueemission at room temperature was the co-effect of the emission quenching related toTi4+ ions and the increasing of the blue-green band absorption corresPOnding to Ti3+ ions.Absorption band Peaked at 266 urn in the ultraviolet absorption spectrum was constructedby charge transfer transtions of Ti4+ and Fe3+ ions in Ti: A12O3 crystal. |
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| Keywords: | Ti: Al_2O_3 crystal spectroscopy color center charge transfer |
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