| 飞秒激光辐照ZnO晶体 |
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| 引用本文： | 孙晓慧,汪晨,郭晓东.飞秒激光辐照ZnO晶体[J].激光与光电子学进展,2007,44(11):31-35. |
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| 作者姓名： | 孙晓慧 汪晨 郭晓东 |
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| 作者单位： | 1. 上海工程技术大学基础教学学院,上海,201600
2. 中国科学院上海光学精密机械研究所,上海,201800 |
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| 基金项目： | 上海市高校优秀青年教师后备人选科研项目 |
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| 摘 要： | 利用飞秒激光对ZnO晶体进行辐照,对辐照前后的晶体样品进行发光光谱及拉曼光谱检测.辐照后发光光谱的某些发光峰强度有明显增强,但未产生新的发光峰,表明没有新的缺陷结构产生,但晶体内锌空位、间隙位锌、间隙位缺陷浓度增加.拉曼光谱结果表明,辐照后ZnO晶体未产生相变,但随着辐照激光功率的增大,拉曼峰327 cm-1,437 cm-1强度明显减弱,表明在飞秒激光辐照作用下氧化锌的结晶程度下降.但574 cm-1峰值却随着辐照功率的增大而变大,分析表明该拉曼峰很可能是由于晶体内间隙位缺陷所致.同时实验过程中观察到飞秒激光倍频光产生.
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| 关 键 词： | 飞秒激光 晶体缺陷 发光光谱 拉曼光谱 ZnO晶体 飞秒激光辐照 晶体 Femtosecond Laser Crystal 激光倍频 实验过程 缺陷浓度 分析表 辐照功率 峰值 结晶程度 氧化锌 辐照作用 峰强度 激光功率 相变 结果 拉曼光谱 间隙位 空位 |
| 收稿时间： | 2007/8/31 |
| 修稿时间： | 2007-08-31 |
Irradiation on ZnO Crystal by Femtosecond Laser |
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| SUN Xiaohui,WANG Chen,GUO Xiaodong.Irradiation on ZnO Crystal by Femtosecond Laser[J].Laser & Optoelectronics Progress,2007,44(11):31-35. |
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| Authors: | SUN Xiaohui WANG Chen GUO Xiaodong |
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| Affiliation: | 1. College of Fundamental Studies, Shanghai University of Engineering Science, Shanghai 201600 ; 2. Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800 |
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| Abstract: | Femtosecond laser is used to irradiate ZnO crystal grown by hydrothermal method. Luminescence spectra and Raman spectra are measured before and after the laser irradiation. Luminescence spectra show the intensity of some emission peaks is increased after the irradiation, but no new emission peaks are found, indicating that no new crystal defects are formed and the concentrations of zinc vacancy, zinc interstitial and oxygen interstitials are increased. Raman spectra show no phase change occurs in ZnO crystal. The decrease of peak values for 327 cm^-1and 437 cm^-1 show the crystallinity becomes worse. However, the 574 cm^-1peak value is increased with the increase of irradiation laser power, and this peak is related to zinc interstitial in all probability. Secondharmonic emission is observed during the experiment. |
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| Keywords: | femtosecond laser crystal defect luminescence spectra Raman spectra ZnO crystal |
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