| 高激发下CdS晶体中激发态的衰减 |
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| 引用本文： | 李振钢,赵智虹,沙洪钧.高激发下CdS晶体中激发态的衰减[J].天津师范大学学报(自然科学版),1993(1). |
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| 作者姓名： | 李振钢 赵智虹 沙洪钧 |
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| 作者单位： | 天津师范大学物理系,天津理工学院材料物理所,天津理工学院一分院 |
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| 基金项目： | 国家自然科学基金,中国科学院长春物理所激发态物理开放实验室资助项目 |
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| 摘 要： | 在室温下,我们用“泵浦-探测”方法对CdS单晶的光学非线性吸收的时间过程进行了实验研究。并用激子之间相互作用,激子与电子相互作用以及激子自发衰减三种导致激子浓度减小因素的模型对实验曲线进行了数学模拟,发现理论与实验曲线符合很好。文中给出了三种过程的时间常数及相应的权重。
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| 关 键 词： | 光学非线性 “泵浦——探测” 激子 |
THE EXCITED STATE DECAY IN CdS CRYSTAL UNDER INTENSIVE EXCITATION |
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| Li Zhengang,Zhao Zhihong,Sha Honggun Dept. of Phys.,Tianjin Normal University Inst. of Material Phys.,Tianjin Institute of Technology Frist Branch of Tianjin Institute of Technology.THE EXCITED STATE DECAY IN CdS CRYSTAL UNDER INTENSIVE EXCITATION[J].Journal of Tianjin Normal University(Natural Science Edition),1993(1). |
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| Authors: | Li Zhengang Zhao Zhihong Sha Honggun Dept of Phys Tianjin Normal University Inst of Material Phys Tianjin Institute of Technology Frist Branch of Tianjin Institute of Technology |
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| Abstract: | The time process of nonlinear optical absorption of CdS crystal at roomtemperature has been studied. In the paper, the relation between the transmisstivity of CdScrystal under intense excitation and delay time of probe light was measured, and the resultsare analyzed numerically based on the exciton-exciton scattering, exciton-electron scat-tering and exciton self-decay model. Theoritical results are in agreement with the experi-mental results, and the wights of the tree ways has been shown in the paper. |
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| Keywords: | optical nonlinear "pump-probe" exciton |
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