Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 49: Poster – Photonics, Lasers, and Applications
Q 49.41: Poster
Wednesday, March 12, 2025, 17:00–19:00, Tent
Coherent Optical Control of Semiconductor Quantum Dots — •Charlie Evagora1, Rene Schwarz1, Saimon da Silva2, Armando Rastelli2, Doris Reiter3, Vikas Remesh1, and Gregor Weihs1 — 1Institute for Experimental Physics, University of Innsbruck, Technikerstrasse 25d, 6020 Innsbruck, Austria — 2Institute of Semiconductor Physics, Johannes Kepler University Linz, Altenbergerstr. 69, A-4040 Linz, Austria — 3Condensed Matter Theory, Department of Physics, TU Dortmund, 44221 Dortmund, Germany
The development of quantum technologies is heavily dependent on reliable sources of single photons with near perfect indistinguishability. In recent years, semiconductor quantum dots (QD) have become a viable platform with high brightness, tunability, and deterministic mode of operation.
The most prominent scheme for QD excitation is the Rabi scheme, using an on-resonance pulse to invert the emitter population. Despite guaranteeing near perfect photon properties, it is counterproductive in terms of brightness, necessitating extra filtering procedures.
Given this context, an alternative scheme that has gained particular interest is the Swing-UP of quantum EmitteR (SUPER) scheme, which uses 2 red-detuned pulses to drive population inversion. This scheme was realised by our group for a GaAs/AlGaAs system, which has subsequently been implemented by numerous other groups for a variety of platforms. Here we report detailed investigation on the detuning dependence of photon indistinguishability and photon number purity under SUPER excitation.
Keywords: quantum dots; excitation schemes