Modeling Quantum Beats by Degenerate Four‐Wave Mixing Spectroscopy in a Single GaAs/AlGaAs Quantum Ring

Abstract

It has been proposed theoretically that quantum beat spectroscopy provides a direct experimental evidence of the fine states of quantized ring orbital angular momentum in a quantum ring. When a pair of picosecond pulses excites the fine exciton states coherently, oscillations can be observed in time‐integrated degenerate four‐wave mixing signals for increasing delay time. It has been found that the oscillation periods are dominated by energy separations of the fine levels near the central energy of laser spectrum due to strong coherent coupling. Magnetic dependence of the fine level separation is also investigated in terms of signal intensity and quantum beat periods.

Topology and Geometry Controlled Properties of Nanoarchitectures

“…Direct evidence of the states with quantized orbital angular momentum in a quantum ring through quantum beat spectroscopy was theoretically established by Koochul Je and Kwangseuk Kyhm within an assumption that the orbits were in a one‐dimensional loop. In the case where two picosecond pulses excited the fine exciton states coherently, time‐integrated degenerate four‐wave mixing signals manifested oscillations with increasing delay time.…”

Четырехволновое взаимодействие на фазово-амплитудных голографических решетках в фоторефрактивном пьезокристалле класса симметрии 43m

“…Полученные результаты демонстрируют, что кристаллы Ga/AlGaAs могут являться эффективным источником нелинейного оптического взаимодействия в лазерах. В настоящее время четырехволновое взаимодействие применяется для изучения и совершенствования полупроводниковых лазеров на квантовых точках (см., напр., [10][11][12]).…”