Optical Stark Effect in Quantum Dots for Exciton Confinement Regime

本研究的目的是利用激子里德堡态之间的跃迁来观察量子点中激子限制区的光学斯塔克效应。我测量了CuCl体和量子点中激子和双激子的里德堡激发态。首次在半导体块体晶体中观察到由1s和2p激子组成的双激子激发态。此外，在CuCl量子点中的瞬态吸收能量相同的跃迁过程是高于那些在体晶体。

The purpose of this research is to observe an optical Stark effect in a quantum dots for exciton confinement regime by utilizing a transition between exciton Rydberg states. I measured Rydberg excited states of excitons and biexcitons in CuCl bulk and quantum dots. The excited biexciton state composed of 1s and 2p excitons was observed for the first time for a semiconductor bulk crystal. In addition, the transient absorption energies for the same transition processes in CuCl quantum dots are higher than those in the bulk crystals.