不同掺杂浓度Tm^(3+)在YVO_4晶体中光吸收各向异性的研究  

A Study on the Anisotropy of Optical Absorption of Tm^(3+) :YVO 4 Crystal with Various Doping level

作　　者：林秀华[1] 江炳熙[1] 李雪松 

机构地区：[1]厦门大学物理学系,生物学系厦门361005 [2]中国科学院红外物理国家实验室,上海200083

出　　处：《光电子．激光》1999年第4期351-354,共4页Journal of Optoelectronics·Laser

基　　金：福建省自然科学基金;中科院上海技术物理所红外物理国家实验室资助

摘　　要：在室温下测量了３ 种不同的掺杂浓度（６０ ａｔ％ ，４．０ ａｔ％ ，３．２ ａｔ％ ） Ｙ Ｖ Ｏ４： Ｔｍ ３＋ 在２００～９００ ｎｍ波段的吸收光谱。结果指出， Ｔｍ ３＋ 掺杂的 Ｙ Ｖ Ｏ４ 晶体光吸收值随 Ｔｍ ３＋ 浓度而变化，每一谱带形状和结构是相似的；而高掺杂浓度 Ｔｍ ３＋ 的光吸收相对强度比低掺杂浓度的 Ｙ Ｖ Ｏ４ 吸收强；不同晶轴 Ｙ Ｖ Ｏ４ 晶体吸收质显示出各向异性。观察到在ａ 晶轴含有π和σ偏振的吸收谱。简要地讨论了 Ｔｍ ３＋ ： Ｙ Ｖ Ｏ４ 光吸收能级跃迁性质。The optical absorption spectra of Tm 3+ in YVO 4 crystals plates with various doping concentration(6 at%、4 at%、3.2 at% respectively) were measured at room temperature in the wavelength range from 200 nm to 900 nm.The results indicated that the absorbance varies with Tm 3+ concentration in YVO 4 crystal and the shape and structure of group bands are similar and the intensity of absorption for the high Tm 3+ doping concentration samples is stronger than that for the low Tm 3+ concentration samples.It is clear that the absorption characteristics for different axes of Tm 3+ :YVO 4 crystal show optical anisotropy,and the absorption spectra of a axis crystal plates including both π and σ polarization were observed.The absorption transition characteristics of Tm 3+ :YVO 4 have been discussed briefly.

关 键 词：YVO4晶体 光吸收谱 光学各向异性 铥 掺杂 

分 类 号：TN244[电子电信—物理电子学] O734.1[理学—晶体学]