Optical Signals to Monitor the Dynamics of Phonon-Modified Rabi Oscillations in a Quantum Dot,Annalen Der Physik

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Optical Signals to Monitor the Dynamics of Phonon-Modified Rabi Oscillations in a Quantum Dot
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-05-13 , DOI: 10.1002/andp.202100086
Marius R. Klaßen ₁ , Doris E. Reiter ₁

Affiliation

Semiconductor quantum dots are solid state few-level systems which can interact strongly with light. As such, they can be used as a single photon source or to perform solid-state quantum-optics experiments. A major difference to atoms is the interaction with the lattice vibrations, that is, the phonons, which strongly affect the optical signals from a quantum dot. In this paper, we calculate the time-resolved pump-probe signals from a continuously driven quantum dot accounting for detuned excitation and electron–phonon interaction. We provide analytical equations giving insight into the different phenomena observed in the spectra like an oscillation between absorptive and dispersive line shapes. For detuned excitation, the electron–phonon interaction can lead to phonon-assisted occupation of the exciton, giving rise to a strong asymmetry in the dynamical behavior depending on the sign of the detuning. The time-resolved spectra monitor this relaxation path, which helps understanding the effect of electron–phonon interaction in quantum dots.

中文翻译：

用于监测量子点中声子修正 Rabi 振荡动力学的光信号

半导体量子点是固态少能级系统，可以与光强相互作用。因此，它们可以用作单光子源或进行固态量子光学实验。与原子的主要区别是与晶格振动的相互作用，即声子，它强烈影响来自量子点的光信号。在本文中，我们计算了来自连续驱动的量子点的时间分辨泵浦探测信号，考虑了失谐激发和电子-声子相互作用。我们提供分析方程，深入了解光谱中观察到的不同现象，例如吸收线形状和色散线形状之间的振荡。对于失谐激发，电子-声子相互作用会导致激子的声子辅助占据，根据失谐的符号，在动力学行为中产生强烈的不对称性。时间分辨光谱监测这个弛豫路径，这有助于理解量子点中电子-声子相互作用的影响。

更新日期：2021-07-12

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