Regensburg 2022 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 26: Quantum Dots and Wires 5: Optics 2
HL 26.7: Talk
Thursday, September 8, 2022, 11:30–11:45, H32
To boldy excite where no one has excited before — Thomas K. Bracht1, Yusuf Karli2, Florian Kappe2, Vikas Remesh2, Tim Seidelmann3, Armando Rastelli4, Gregor Weihs2, Vollrath Martin Axt3, and •Doris E. Reiter1,5 — 1Institut 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.