比较研究了InGaAs/GaAs量子链和量子点的稳态和瞬态光学特性.实验发现,量子链的荧光寿命有很强的探测能量依赖关系,而量子点的荧光寿命随能量变化较小;量子链的荧光寿命随着激发功率迅速增加,高功率时趋于饱和,而量子点的荧光寿命随激发功率变化缓慢;此外,量子链样品的荧光上升时间也比量子点的小得多.这些结果清楚表明,在量子链结构中,参与发光的载流子之间存在很强的耦合和输运.进一步分析表明,这种耦合作用主要发生在量子链方向.荧光的偏振特性进一步证实了这一点. The steady-state and transient optical properties of InGaAs / GaAs QDs and QDs have been comparatively studied. The experimental results show that the fluorescence lifetime of the QDs is strongly dependent on the energy of the detector and the fluorescence lifetime of QDs changes little with the energy. Quantum The fluorescence lifetime of the chain increases rapidly with the excitation power and tends to be saturated at high power, while the fluorescence lifetime of the quantum dots changes slowly with the excitation power. In addition, the fluorescence rise time of the quantum-chain samples is also much smaller than that of the quantum dots. It is clearly shown that there is a strong coupling and transport between the carriers involved in the luminescence in the quantum chain structure, and further analysis shows that this coupling mainly occurs in the direction of the quantum chain. This is further confirmed by the polarization characteristics of the fluorescence .