量子点激子超辐射的条件和量子点集合的相干辐射  

The Condition of Exciton Superradiance in Quantum Dot and Coherent Radiation of Excitons in Nano-crystal Assemble

作　　者：李志强[1] 林伟[1] 丁才蓉[1] 汪河洲[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广东广州510275

出　　处：《量子光学学报》2011年第2期141-145,共5页Journal of Quantum Optics

基　　金：国家自然科学基金(108742501;1074311;10804131)

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。In semiconductor quantum dots, coherent radiation of excitons includes lasing and In this paper, we report the theory of superradiance of excitons in quantum dot. Our results excited source for superradiance of excitons in single quantum dot should he shorter Furthermore, While, for the density will be we report our experimental observation of superradiance in a single ZnO nano-crystal assemble, the exponential increasing of emission peak intensity covered by the linear relationship between nano-crystals in assemble superradiance. reveal that the than 100 fs. quantum dot. the pump density will be covered by the linear relationship between nano-crystals in assemble.

关 键 词：量子点 激子 超辐射 激射 半导体纳米晶集合 

分 类 号：O431[机械工程—光学工程]