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Optical Spectroscopy of Semiconductor Quantum Structures

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Welcome to the pages of our research group!

We are exploring the quasi-particle- and the spin dynamics in semiconductor quantum structures. The materials of interest are either GaAs-AlGaAs quantum structures, like quantum wells or nanowires, or, two-dimensional crystals (transition-metal dichalcogenides), like MoS₂, MoSe₂, WS₂, and WSe₂, and their van-der-Waals heterostructures. As experimental techniques we are employing time- and spatially-resolved Kerr/Faraday rotation, time-resolved photoluminescence, Raman spectroscopy, and four-wave mixing. The experiments are typically carried out at low temperatures, and, optionally, in high magnetic fields.

News and Highlights

September 2023	Our work on "Emergent trion-phonon coupling in atomically reconstructed MoSe₂-WSe₂heterobilayers" is published as a Letter in Physical Review Research.
January 2023	A radio report about our finding of ultrafast pseudospin quantum beats in TMDC multilayers is broadcasted in "Forschung aktuell" in "Deutschlandfunk".
August 2022	Our work on "Ultrafast pseudospin quantum beats in multilayer WSe₂ and MoSe₂" is published in Nature Communications.
August 2022	Our work on "Valley-magnetophonon resonance for interlayer excitons" is published in 2D Materials.
December 2021	Our work on "Intersubband excitations in ultrathin core-shell nanowires in the one-dimensional quantum limit probed by resonant inelastic light scattering" is published in Physical Review B.
September 2021	Our work on "Ultrafast Charge-Transfer Dynamics in Twisted MoS₂/WSe₂ Heterostructures" is published in ACS Nano.
July 2021	Our work on "Large-Scale Mapping of Moiré Superlattices by Hyperspectral Raman Imaging" is published in Advanced Materials.
May 2021	Our work on "Moiré phonons in twisted MoSe₂–WSe₂ heterobilayers and their correlation with interlayer excitons" is published in 2D Materials.
July 2020	Our work on "Low-frequency Raman scattering in WSe₂-MoSe₂ heterobilayers: Evidence for atomic reconstruction" is published in Applied Physics Letters.
January 2020	Our work on "Inelastic light scattering by intrasubband spin-density excitations in GaAs-AlGaAs quantum wells with balanced Bychkov-Rashba and Dresselhaus spin-orbit coupling: Quantitative determination of the spin-orbit field" is published in Physical Review B.

Optical Spectroscopy of Semiconductor Quantum Structures

Welcome to the pages of our research group!

News and Highlights

Optics of Semiconductor Quantum Structures