In close collabortaion with the groups of Christoph Lange (TU Dortmund) and Sergey Ganichev (UR), we were able to use contact-free broadband THz magneto-spectroscopy to map the Dirac cone of buried HgTe quantum wells with sub-meV precision, revealing small band gaps and the onset of relativistic Landau quantization.
We are delighted to congratulate Manuel Meierhofer on the successful completion of his PhD thesis “Visualizing Lightwave Electronics in Momentum Space.” We are equally excited to share that Manuel will continue with us as Team Leader for Subcycle Photoemission. We look forward to many more years of inspiring research and fruitful collaboration together.
Image (from left to right): Ulrich H?fer, Manuel Meierhofer, Rupert Huber.
Our lecture on physics of atoms and molecules was awarded with the Best Lecture Award of the Faculty of Physics.
Image (from left to right): Peter Menden, Felix Schiegl, Andreas Rank, Simon Anglhuber, Rupert Huber, Michael Aschenbrenner, Karoline Bernhard-H?fer.
Missing: Svenja Nerreter, Katharina Gl?ckl, Jakob Helml...
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We warmly congratulate Dr. Johannes Hayes on the successful completion of his PhD thesis, “Subcycle Optical Nanoscopy with Atomic-Scale Resolution.” While Johannes will be moving on to new opportunities beyond our group, we sincerely thank him for his contributions and wish him all the very best for the future.
Image (from left to right): Rupert Huber, Johannes Hayes.
We warmly congratulate Professor Michael Zuerch (UC Berkeley) on receiving the prestigious Friedrich Wilhelm Bessel Research Award from the Alexander von Humboldt Foundation. His innovative work in ultrafast X-ray spectroscopy provides new insights into electron dynamics and symmetry in quantum materials. With the price he plans a research stay at the Regensburg Center for Ultrafast Nanoscopy. We are excited to welcome him and look forward to a fruitful collaboration exploring fundamental light–matter interactions on ultrashort timescales.
We explored how the antiferromagnetic spin alignment in adjacent layers of the van der Waals crystal CrSBr confines Coulomb bound electron hole pairs into one dimension. In two back-to-back publications in Nature Materials, we discovered two key signatures of this intriguing process:
In a close collaboration with the groups of Mackillo Kira (University of Michigan), Zdeněk Sofer (University of Chemistry and Technology Prague) and Florian Dirnberger (Technical University of Munich), we resolved the internal structure and a strong fine-structure splitting of the excitons.
We also contributed to a complementary study by the groups of D. N. Basov (Columbia University, New York) and colleagues as well as Alexey Chernikov (TU Dresden) to identify a new exciton species living exquisitely at the surfaces of the quasi-one-dimensional semiconductor: so-called surface excitons.
We explored a novel approach to directly visualize THz surface polariton propagation in both space and time – accessing the polariton’s group and phase velocities, as well as its damping. Through photoexcitation, we even achieved subcycle control of the polariton propagation.
The results obtained in close collaboration with the group of Miriam Vitiello in Pisa (NEST, CNR) and Eva A. A. Pogna in Milano (CNR-IFN) have been published in Nano Letters (Coverstory).
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We congratulate Joshua Mornhinweg on being awarded the Dissertation Prize by the Faculty of Physics at the University of Regensburg for his remarkable PhD thesis, titled "Tailoring and Non-Adiabatic Control of Deep-Strong Light-Matter Coupling."
This prize, sponsored by the Wilhelm and Else Heraeus Foundation, recognizes an exceptional doctoral thesis in physics and comes with an endowment of �4000.
We are happy to announce that Josef Riepl won the Best Tutor Award of the Faculty of Physics at the University of Regensburg. The price recognizes his outstanding job in teaching and explaining the physics of electrodynamics.
We have developed an approach based on ultrafast near-field microscopy that has allowed us to probe the nanoscale topography, crystallographic phase and chemical composition of metal halide perovskite films, while simultaneously extracting the ultrafast vertical carrier dynamics from femtosecond shifts in the pump-induced response following photoexcitation. This has revealed a surprising robustness of vertical charge transport towards nanoscale structural and compositional variations.
The results obtained in a close collaboration with the group of Michael Johnston (University of Oxford) have appeared in Nature Photonics.
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We congratulate Felix Schiegl on winning the best oral presentation award of the 2024 International workshop Quantum Materials and Structured Light (QMSL) in Erice with his talk titled "All-Optical Subcycle Microscopy of Quantum Materials at the Atomic Scale". The prize honours original contributions to the conference from outstanding student attendees.
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We have discovered an entirely unforeseen quantum-mechanical contrast mechanism that finally enables all-optical microscopy to achieve atomic resolution while retaining subcycle temporal precision. This new concept allows us to directly trace the quantum flow of electrons on their intrinsic length and time scales.
The results obtained in a close collaboration with the group of Jan Wilhelm (University of Regensburg) have appeared in Nature.
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We have established ultrafast scanning tunnelling spectroscopy on the femtosecond time, atomic length and milli-electron-volt energy scale. This has allowed us to directly resolve the energy shift of a single atomic defect in a monolayer of tungsten diselenide due to drum-like phonon vibrations.
The results obtained in a close collaboration with the groups of Jascha Repp (University of Regensburg) and Jan Wilhelm (University of Regensburg) have appeared in Nature Photonics....
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In close collaboration with the groups of Dominique Bougeard (UR) and Christoph Lange (TU Dortmund), we were able to reach record-breaking, deep-strong light-matter coupling with a coupling strength of up to 3.19. This, for the first time, creates vacuum ground state populations exceeding 1 virtual excitation quantum.
? Joshua Mornhinweg, Harvard University
Image (from left to right): Peter Menden, Felix Schiegl, Andreas Rank, Simon Anglhuber, Rupert Huber, Michael Aschenbrenner, Karoline Bernhard-H?fer.
? Brad Baxley, PtW
? Simon Anglhuber, UR
? Brad Baxley, PtW
? Brad Baxley, PtW
? Brad Baxley, PtW
In close collaboration with the groups of Dominique Bougeard (UR) and Christoph Lange (TU Dortmund), we were able to reach record-breaking, deep-strong light-matter coupling with a coupling strength of up to 3.19. This, for the first time, creates vacuum ground state populations exceeding 1 virtual excitation quantum.
