Magneto-optical properties of excitonic complexes in GaAs self-assembled quantum dots

被引：25
|
作者：
Abbarchi, M. [1 ,2 ,3 ]
Kuroda, T. [1 ]
Mano, T. [1 ]
Sakoda, K. [1 ]
Gurioli, M. [2 ,3 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[2] Univ Florence, CNISM, Dipartimento Fis, I-50019 Sesto Fiorentino, Italy
[3] European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 03期
关键词：
MODIFIED DROPLET EPITAXY; OPTICAL-SPECTRA; MAGNETIC-FIELD; ELECTRON; WELLS;
D O I：
10.1103/PhysRevB.81.035334
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：7
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