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Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 26: Quantum Dots and Wires 5: Optics 2

HL 26.7: Vortrag

Donnerstag, 8. September 2022, 11:30–11:45, H32

To boldy excite where no one has excited beforeThomas K. Bracht1, Yusuf Karli2, Florian Kappe2, Vikas Remesh2, Tim Seidelmann3, Armando Rastelli4, Gregor Weihs2, Vollrath Martin Axt3, and •Doris E. Reiter1,51Institut für Festkörpertheorie, Universität Münster, 48149 Münster, Germany — 2Institute für Experimentalphysik, Universität Innsbruck, Innsbruck, Austria — 3Institute of Semiconductor and Solid State Physics, JKU Linz, Linz, Austria — 4Theoretische Physik III, Universität Bayreuth, 95440 Bayreuth, Germany — 5Condensed Matter Theory, TU Dortmund, 44221 Dortmund, Germany

In the Rabi scheme, off-resonant excitations of a two-level system do not lead to a full inversion, when no further auxiliary particles are participating. Surprisingly, the Swing-UP of the quantum EmitteR population (SUPER) scheme uses off-resonant excitations to fully bring a two-level system from the ground to excited state [PRX Quantum 2, 040354 (2021)]. The scheme relies on a gradual swing-up, which can be achieved by modulation of the excitation frequency or amplitude. Here, we discuss the theory of the SUPER scheme and how it can implemented for a semiconductor quantum dot by using a two-color excitation with pulses detuned by several meV. Due to the electron-phonon interaction, the SUPER scheme results in the emission of phonon wave packets [pssb, 2100649 (2022)], but overall the phonon influence is rather small. The experimental realization of SUPER scheme [arXiv:2203.00712 (2022)], as will be presented in a different contribution, shows great agreement with the theoretical prediction.

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