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| 飞秒激光诱导二氧化钛金红石单晶相变的拉曼光谱研究 | |
| 引用本文： | 杨俊毅,马洪良,鲁波,马国宏.飞秒激光诱导二氧化钛金红石单晶相变的拉曼光谱研究[J].光学学报,2007,27(10):1909-1912. |
| 作者姓名： | 杨俊毅 马洪良 鲁波 马国宏 |
| 作者单位： | 1. 上海大学理学院物理系,上海,200444;上海大学分析测试中心,上海,200444 2. 上海大学分析测试中心,上海,200444 3. 上海大学理学院物理系,上海,200444 |
| 基金项目： | 上海市重点学科建设基金(T0104)，上海市教委基金，上海市科委纳米专项(0652nm005)，上海市科委基金(06PJ14042)资助课题 |
| 摘 要： | 利用显微拉曼光谱仪研究了近红外飞秒激光脉冲诱导二氧化钛金红石单晶所引起的相变。实验发现当激光的平均功率为300 mW时,随着辐照时间的增加,金红石相的Eg模式强度增强,而A1g模式强度减弱,由此得出激光诱导晶体产生了色心;辐照时间为10 s时,锐钛矿相出现;并且随着辐照时间的增加,锐钛矿相的拉曼振动模式强度增强,金红石相的减弱。然而当辐照时间确定为1/63 s时,随着激光功率的增加,金红石Eg模式强度与A1g模式强度的比值增加,而没有锐钛矿相出现。 |
| 关 键 词： | 超快光学 相变 锐钛矿 飞秒激光 显微拉曼光谱术 |
| 文章编号： | 0253-2239（2007）10-1909-4 |
| 收稿时间： | 2007/2/8 |
| 修稿时间： | 2007-02-08 |
Raman Spectroscopy Study of Phase Transformation of TiO2 Rutile Single Crystal Induced by Infrared Femtosecond Laser |
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| Yang Junyi,Ma Hongliang,Lu Bo,Ma Guohong.Raman Spectroscopy Study of Phase Transformation of TiO2 Rutile Single Crystal Induced by Infrared Femtosecond Laser[J].Acta Optica Sinica,2007,27(10):1909-1912. | |
| Authors: | Yang Junyi Ma Hongliang Lu Bo Ma Guohong |
| Institution: | 1. Department of Physics, Shanghai University, Shanghai 200444; 2. Instrumental Analysis and Research Center, Shanghai University, Shanghai 200444 |
| Abstract: | The phase transformation of rutile TiO2 single crystal irradiated by femtosecond laser pulses was studied by micro-Raman spectroscopy.It is found that when the femtosecond laser average power is 300 mW,with the increase of irradiation time,the intensity of Raman active mode Eg increases while that of A1g decreases,which suggests that the color center is induced.When the irradiation time is about 10 s,the component of anatase emerges and with increase of the irradiation time the intensity of Raman active modes of anatase increases while that of rutile decreases.But if the irradiation time is 1/63 s,with the increase of average power of laser,the intensity of Eg increases and that of A1g decreases apparently within the ablation crater,and no anatase appears. |
| Keywords: | ultrafast optics phase transformation anatase femtosecond laser micro-Raman spectroscopy |
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