| ZnO纳米颗粒受激发射的时间分辨特性 |
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| 引用本文： | 王晓芳,谢平波,赵福利,汪河洲.ZnO纳米颗粒受激发射的时间分辨特性[J].光谱学与光谱分析,2009,29(6):1459-1462. |
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| 作者姓名： | 王晓芳 谢平波 赵福利 汪河洲 |
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| 作者单位： | 1. 华南理工大学材料科学与工程学院，广东 广州 510641
2. 中山大学理工学院光电材料与技术国家重点实验室，广东 广州 510275 |
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| 基金项目： | 国家自然科学基金，广东省科技计划项目 |
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| 摘 要： | 在飞秒脉冲激光激发下，观察到了均匀沉积法获得的ZnO纳米颗粒的受激辐射现象，并从频域和时域两方面研究了ZnO纳米多晶的室温激射特性。氧化锌纳米颗粒中出现激子-激子散射导致的激射阈值为7.2 GW·cm-2,激射模式类似于F-P谐振腔模式，时域谱则表现为寿命曲线中出现快速衰减成分。与荧光的时间衰减曲线不同，P带时间衰减具有对称结构，高斯拟合结果只有几个ps，接近条纹相机的时间分辨率极限。研究ZnO纳米颗粒的受激发射与激光特性对揭示ZnO晶体的内部结构和激子激发态的性质、激光产生的机理等有重要意义。
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| 关 键 词： | ZnO纳米颗粒 时间分辨 受激发射 |
| 收稿时间： | 2008/5/26 |
Time-Resolved Photoluminescence of Stimulated Emission from ZnO Nanoparticles |
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| WANG Xiao-fang,XIE Ping-bo,ZHAO Fu-li,WANG He-zhou.Time-Resolved Photoluminescence of Stimulated Emission from ZnO Nanoparticles[J].Spectroscopy and Spectral Analysis,2009,29(6):1459-1462. |
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| Authors: | WANG Xiao-fang XIE Ping-bo ZHAO Fu-li WANG He-zhou |
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| Institution: | 1. College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China2. State Key Laboratory of Optoelectonic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China |
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| Abstract: | The detailed room-temperature stimulated emission including its optical characteristics from nanosized ZnO particles prepared by homogenous precipitation method was investigated by time-resolved spectroscopy both from the frequency domain and time domain.As the excitation power was increased,sharp lasing peaks with the full width at half maximum less than 0.5 nm, similar to the FP lasing mode resonator mode,emerged rapidly from the emission spectra.Additionally,a narrow emission line intensity increased rap... |
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| Keywords: | ZnO nanoparticles Time resolved Stimulated emission |
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