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HL: Fachverband Halbleiterphysik

HL 35: Focus Session: Transient multi-wave mixing on excitonic resonances

Donnerstag, 30. März 2023, 09:30–13:30, POT 251

Coherent nonlinear optical spectroscopy and, in particular, transient multi-wave mixing processes provide valuable information for basic research in material science and applications in photonics and quantum technology. It allows one to obtain detailed information about the energy structure and dynamic evolution of quantum systems including excited states which is not possible via linear optical spectroscopy and gives direct access to higher-order correlations among the elementary optical excitations. In addition, multi-wave mixing processes can be used as a powerful tool to coherently control the electronic states of the system and to generate non-classical states of light, which is appealing for the implementation in quantum information devices. Importantly for these studies is that excitons possess high oscillator strength which leads to a significant increase of higher-order mixing under resonant excitation with ultrashort optical pulses. This session will focus on multi-wave mixing processes as a unique tool to uncover the fascinating physics of excitons and many-body correlations in emerging materials such as transition metal dichalcogenides and perovskites and establish novel approaches for the coherent control of excitonic quantum systems with classical and quantum light.

Organized by I.A. Akimov and T. Meier

	09:30	HL 35.1	Hauptvortrag: Quantum Dynamics of Polarons in Doped Semiconductor Monolayers — •Xiaoqin Elaine Li and Di Huang
	10:00	HL 35.2	Hauptvortrag: Impact of phonons on time-resolved optical signals from excitons — •Doris E. Reiter
	10:30	HL 35.3	Hauptvortrag: Hot-Exciton Quantum Dynamics in Zero-Dimensional Structures — •Alfred Leitenstorfer
	11:00	HL 35.4	Multi-wave mixing applied to explore and control the coherent dynamics of ensembles of semiconductor quantum dots — •Hendrik Rose, Stefan Grisard, Artur V. Trifonov, Rilana Reichhardt, Doris E. Reiter, Matthias Reichelt, Christian Schneider, Martin Kamp, Sven Höfling, Manfred Bayer, Ilya A. Akimov, and Torsten Meier
	11:15	HL 35.5	Nonlinear all-optical coherent generation and read-out of valleys in atomically thin semiconductors — •Sebastian Klimmer, Artem Sinelnik, Muhammad Hussain, Isabelle Staude, Habib Rostami, and Giancarlo Soavi
	11:30		30 min. break
	12:00	HL 35.6	Hauptvortrag: Ultrafast dynamics and wave mixing at excitonic resonances in atomically thin semiconductors — •Andreas Knorr, Dominik Christiansen, Florian Katsch, Manuel Katzer, and Malte Selig
	12:30	HL 35.7	Hauptvortrag: Spontaneous parametric down-conversion in semiconductor metasurfaces — •Maria Chekhova
	13:00	HL 35.8	Time-resolved four-wave mixing spectroscopy of excitons in a FA0.9Cs0.1PbI2.8Br0.2 perovskite crystal — •Stefan Grisard, Artur V. Trifonov, Dmitry N. Dirin, Maksym V. Kovalenko, Ilya A. Akimov, Dmitri R. Yakovlev, and Manfred Bayer
	13:15	HL 35.9	Multi-photon pump probe of magnetic-field-induced quantum beats in Cu2O — •Nikita V. Siverin, Andreas Farenbruch, Dietmar Fröhlich, Dmitri R. Yakovlev und Manfred Bayer