Optical Signals to Monitor the Dynamics of Phonon‐Modified Rabi Oscillations in a Quantum Dot
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- Marius R. Klaßen
- Universität Münster Institut für Festkörpertheorie Wilhelm‐Klemm‐Str. 10 48149 Münster Germany
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- Doris E. Reiter
- Universität Münster Institut für Festkörpertheorie Wilhelm‐Klemm‐Str. 10 48149 Münster Germany
抄録
<jats:title>Abstract</jats:title><jats:p>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.</jats:p>
収録刊行物
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- Annalen der Physik
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Annalen der Physik 533 (7), 2021-05-13
Wiley