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| YAG∶Cr3+ 晶体精细光谱结构研究 | |
| 引用本文： | 魏群,杨子元.YAG∶Cr3+ 晶体精细光谱结构研究[J].光子学报,2006,35(5):688-692. |
| 作者姓名： | 魏群 杨子元 |
| 作者单位： | 1. 宝鸡文理学院物理系,宝鸡,721007 2. 宝鸡文理学院物理系,宝鸡,721007;西安电子科技大学微电子所,西安,710071 |
| 基金项目： | 陕西省教育厅科研项目 , 宝鸡文理学院校科研和教改项目 |
| 摘 要： | 采用不同的晶体畸变模型，利用CDM(complete diagonalization method)方法对YAG∶Cr3+ 晶体的EPR参量进行了系统研究.通过计算结果对晶格畸变模型进行了分析.结果表明,在三角对称下，对杂质离子电荷与中心离子电荷相等的情况，不适合用杂质离子沿C3轴位移的模型来研究晶体的局域结构，而且由于基态和第一激发态的零场分裂都对局域结构微变非常敏感，因此仅由基态零场分裂来确定晶格局域结构是不可靠的.同时结果表明，Cr3+ 离子进入YAG晶体后，产生了Δθ=1.88°的三角畸变.从而成功统一地解释了YAG∶Cr3+ 晶体的EPR参量和精细光谱结构. |
| 关 键 词： | YAG:Cr3+晶体 精细光谱 晶格畸变模型 EPR参量 |
| 收稿时间： | 2005-01-26 |
| 修稿时间： | 2005年1月26日 |
Researches on Fine Spectra Structure in YAG:Cr3+ Crystal |
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| Wei Qun,Yang Ziyuan.Researches on Fine Spectra Structure in YAG:Cr3+ Crystal[J].Acta Photonica Sinica,2006,35(5):688-692. | |
| Authors: | Wei Qun Yang Ziyuan |
| Institution: | (1 Department of Physics, Baoji University of Arts and Science, Baoji 721007) (2 Microelectronics Institute, Xidian University, Xi′an 710071) |
| Abstract: | The EPR parameters and fine spectra for Cr3+ ion in YAG crystal were studied by using two distortion models and complete diagonalization method(CDM). The investigations consider for the first time the spin-spin (SS) and spin-other-orbit (SOO) interactions. The studies show that the local structure in the YAG∶Cr3+ crystal is of the compressed trigonal distortion (Δθ=1.88°). Accordingly,the EPR parameters and fine spectra for Cr3+ ion in YAG crystal are explained successfully. By analyzing these models,it shows that the impurity ion moving model is not suitable if there are the same charge for the impurity ion and host ion. Since local structure is sensitive to both ground state zero field splitting (ZFS) and the first excited state ZFS,it is not reliable to decide local lattice distortion only using ground state ZFS parameter D. |
| Keywords: | YAG∶Cr3+ crystal Fine spectra Lattice distortion models EPR parameters |
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