Optical spectra and Exciton State in Vertically Stacked Self—Assembled Quantum Discs |
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引用本文: | 刘金龙,李树深,牛智川,杨富华,封松林.Optical spectra and Exciton State in Vertically Stacked Self—Assembled Quantum Discs[J].中国物理快报,2003,20(7):1120-1123. |
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作者姓名: | 刘金龙 李树深 牛智川 杨富华 封松林 |
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作者单位: | StateKeyLaboratoryforSuperlatticsandmicrostructures,instituteofSemiconductors,ChineseAcademyofSciences,POBox912.Beijing100083 |
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摘 要: | We study the oscillator strengths of the optical transitions of the vertically stacked self-assembled InAs quantum discs.The oscillator strengths change evidently when the two quantum discs are far apart from each other.A vertically applied electric field affects the oscillator strengths severely.while the oscillator strengths change slowly as the radius of one disc increases.We also studied the excitonic energy of the system.including the Coulomb interaction.The excitonic energy increases with the increasing radius of one disc.but decreases as a vertically applied electric field increases.
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关 键 词: | 半导体 量子点 自组装 光谱 激子 InAs 砷化镓 振子强度 |
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