| 量子点激子超辐射的条件和量子点集合的相干辐射 |
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| 引用本文： | 李志强,林伟,丁才蓉,汪河洲. 量子点激子超辐射的条件和量子点集合的相干辐射[J]. 量子光学学报, 2011, 17(2) |
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| 作者姓名： | 李志强 林伟 丁才蓉 汪河洲 |
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| 作者单位： | 中山大学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(108742501,1074311,10804131) |
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| 摘 要： | 半导体量子点的激子超辐射出现的条件是本文激子超辐射的理论研究中的重点,我们的理论推导结果揭示要观测到半导体量子点的激子超辐射必须采用短于百飞秒的激发源。我们用ZnO单量子点观察到激子超辐射,同时测量和分析讨论了量子点集合的相干辐射性质,发现单量子点超辐射的二次方泵浦与辐射强度关系被大量量子点间的线性递增所掩盖。
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| 关 键 词： | 量子点 激子 超辐射 激射 半导体纳米晶集合 |
The Condition of Exciton Superradiance in Quantum Dot and Coherent Radiation of Excitons in Nano-crystal Assemble |
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| LI Zhi-qiang,LIN Wei,DING Cai-tong,WANG He-zhou. The Condition of Exciton Superradiance in Quantum Dot and Coherent Radiation of Excitons in Nano-crystal Assemble[J]. Acta Sinica Quantum Optica, 2011, 17(2) |
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| Authors: | LI Zhi-qiang LIN Wei DING Cai-tong WANG He-zhou |
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| Affiliation: | LI Zhi-qiang,LIN Wei,DING Cai-rong,WANG He-zhou (State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-Sen University,Guangzhou 510275,China) |
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| Abstract: | In semiconductor quantum dots,coherent radiation of excitons includes lasing and superradiance.In this paper,we report the theory of superradiance of excitons in quantum dot.Our results reveal that the excited source for superradiance of excitons in single quantum dot should be shorter than 100 fs.Furthermore,we report our experimental observation of superradiance in a single ZnO quantum dot.While,for the nano-crystal assemble,the exponential increasing of emission peak intensity with the pump density will ... |
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| Keywords: | quantum dot exciton superradiance lasing nano-crystal assemble |
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