Magneto-optical properties of excitonic complexes in GaAs self-assembled quantum dots
Magneto-optical properties of excitonic complexes in GaAs self-assembled quantum dots
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DOI：
10.1103/physrevb.81.035334
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发表时间：
2010-01-01
影响因子：
3.7
通讯作者：
Gurioli, M.
中科院分区：
文献类型：
--
作者：
Abbarchi, M.;Kuroda, T.;Gurioli, M.
我们报告了一个详细的实验研究不同的激子复合物（中性激子，中性双激子，带电激子）限制在自组装GaAs/AlGaAs应变无量子点生长液滴外延，其中所有的压电效应是缺乏的磁光特性。我们测量了几个量子点的朗德g因子和抗磁性系数γ，跨越类似于200毫电子伏的发射能量的间隔。与Stranski-Krastanov和波动诱导的GaAs量子点，以及与激子限制在量子威尔斯量子点的大小和形状的依赖关系的g和γ一起讨论的比较。
We report a detailed experimental investigation of the magneto-optical properties of different excitonic complexes (neutral exciton, neutral biexciton, and charged exciton) confined in self-assembled GaAs/AlGaAs strain-free quantum dots grown by droplet epitaxy, where all piezoelectric effects are lacking. We measured the Lande g factor and the diamagnetic coefficient gamma for several quantum dots spanning an interval of similar to 200 meV of the emission energy. The dependence of g and gamma on quantum dot size and shape is discussed together with a comparison with Stranski-Krastanov and fluctuation-induced GaAs quantum dots, as well as with excitons confined in quantum wells.