摘要
研究了量子阱材料光反射光谱的电调制机理,根据斯塔克效应,对量子阱中非激子的带间跃迁和激子跃迁两种情况,分析了电场引起的介电函数的改变和相应的光反射调制光谱线形,对GaAs/AlGaAs量子阱所得光反射光谱的实验结果与理论分析基本符合.
Electromodulation mechanisms of photoreflectance (PR) spectra of quantum. well (QW) structures are studied. The variation of dielectric function due to electric field and the corresponding spectral line shapes of PR of QW_s are analysed on the basis of the Stark effect modulation of non-excitonic and excitonic interband transitions. The experimental results for GaAs/AlGaAs QW agree well with the theoretical analysis.
出处
《红外研究》
CSCD
北大核心
1989年第1期15-21,共7页
