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Welcome to the group of Prof. Huber at University of Regensburg!

Many of the fundamental laws and unexpected phenomena in condensed matter physics are caused by extremely fast dynamics of electrons and ions on the femtosecond time [1] and terahertz frequency scale [2]. Unravelling such ultrafast processes is the main interest of our research. We develop next-generation, high-intensity femtosecond laser sources and THz technology, and employ them to explore novel femtophysics.


[1] 1 fs = 10-15 s
[2] 1 THz = 1012 Hz



News


Topology at cyberspeed

Thermal heating has limited the clock rates of modern electronics for many years. Together with the group of Ulrich Höfer (University of Marburg) and collaborators from Novosibirsk State University and Hiroshima University, we have now discovered a convincing way out: Electrons at the surface of a topological insulator – unlike a conventional semiconductor – can be accelerated inertia- und dissipation-free by the carrier field of light. We have directly observed this unusual electron motion in the first slow-motion movie of an electronic bandstructure, reaching a time resolution better than a cycle of light. Future electronics using topology may thus stay cool even at optical clock rates.

The results are reported in Nature.

Press release (UR): in German/Deutsch
Press release (idw): in German/Deutsch

Also see Ulrich Höfer’s post in the Nature Research Device and Materials Engineering Community.

Homepage of the Höfer group in Marburg


Congratulations to Dr. Jessica Boland! She has been awarded a permanent position as a Lecturer in Functional Materials and Devices at the University of Manchester. In October, she will be joining the Photon Science Institute and Advanced Functional Materials and Devices group in the School of Electrical and Electronic Engineering and is looking forward to building her own research group, focused on the use of terahertz spectroscopy and microscopy for nanomaterial characterisation and the development of novel nanotechnological devices.



The Optical Society of America (OSA) has elected Rupert Huber a Fellow of the Society during their 17 September 2018 meeting in Washington, DC, USA. The OSA recognizes Rupert Huber’s “groundbreaking contributions to ultrafast terahertz science and technology”.



Dr. Zhensheng Tao has been awarded a Humboldt Research Fellowship for the next two years. The fellowship aims to attract outstanding international candidates to Germany and support scientific researchers who have potential to emerge as leaders in their field.



Funding recommendation for RUN

The German Wissenschaftsrat has recommended the interdisciplinary research center RUN to be funded. Among all competing projects the new center has been ranked among the two best initiatives and will be funded with 40 million Euros, conditional to the final admission by the GWK (Gemeinsame Wissenschaftskonferenz von Bund und Ländern).

RUN is an acronym for Regensburg Center for Ultrafast Nanoscopy - a new building where scientists will work at the intersection of biology, chemistry and physics to explore the ultrafast motion of the nanocosm with unprecedented spatial and temporal resolution.

Press release (UR): in German/Deutsch
Press release (idw): in German/Deutsch

Article in the Newspaper "Straubinger Tagblatt" (print version of June 9th, 2018).
Article in the Physik Journal 17 (2018) of the Deutsche Physikalische Gesellschaft (DPG).


Dominik Peller wins Maiman Competition 2018

Congratulations! Dominik Peller won the Maiman Outstanding Student Paper Competition at CLEO 2018. The international contest recognizes student innovation, research excellence and presentation skills in the areas of laser technology and electro-optics. The jury honored his presentation of the group's recent work on ultrafast molecular movies during the finals in San Jose (USA), awarding him the Grand Prize of the competition.




Lightwave valleytronics in a monolayer of tungsten diselenide

Future quantum information technologies need robust and quickly switchable states to be used as quantum bits. Such a qubit may be provided by a spin-like quantity called valley pseudospin, describing the position of electrons in either of two distinct energetic valleys in momentum space. In a collaboration with the groups of Mackillo Kira (University of Michigan), Stephan Koch (University of Marburg), Christian Schüller and Tobias Korn (University of Regensburg) and Jaroslav Fabian (University of Regensburg) we have shown how the valley pseudospin of a monolayer of tungsten diselenide can be switched using an intense lightwave to accelerate the electrons from one valley to the other faster than a single oscillation of light. This opens the door to room-temperature quantum signal processing at optical clock rates.

The results are reported in Nature 557, 76-80 (2018)

Also see visual explainer on lightwave valleytronics by University of Michigan.

Press release (UR): in German/Deutsch
Press release (idw): in German/Deutsch
Press release (University of Michigan): in English



Congratuations to Dr. Alexey Chernikov for receiving the Heinz Maier-Leibnitz Prize 2018!

Dr. Alexey Chernikov, leader of an independent Emmy Noether junior group, has received the Heinz Maier-Leibnitz Prize 2018 for his groundbreaking work advancing the current understanding of elementary optical excitations and especially excitons in atomically thin monolayers!

Congratulations from all!




Dielectric Engineering of Electronic Correlations in a van der Waals Heterostructure

In a collaboration with the groups of Christian Schüller, Tobias Korn, Alexey Chernikov, and Ermin Malic we investigated how a capping layer of hexagonal boron nitride renormalizes the internal structure of excitons in a tungsten diselenide monolayer using sub-cycle multi-THz spectroscopy.

The results are reported in Nano Letters (2018) | doi: 10.1021/acs.nanolett.7b05132.




Dr. Jessica Boland has been awarded a Humboldt Research Fellowship to support her stay here in Germany for the next 2 years. The fellowship aims to attract outstanding international candidates to Germany and support scientific researchers who have potential to emerge as leaders in their field.





Dr. Jessica Boland receives IOP's Jocelyn Bell Burnell Medal and Prize


Dr. Jessica Boland has been awarded with the IOP's Jocelyn Bell Burnell Medal and Prize. She has been honoured for her substantial contribution to physics and support and encouragement of others in the field.

Press release (UR): in German/Deutsch
Press release (IOP): in English
Press release (idw): in German/Deutsch




The crystal harmony of light

High-harmonic sources yield the shortest light pulses physicists can produce. In collaboration with the groups of Stephan W. Koch (University of Marburg) and Mackillo Kira (University of Michigan), we have shown how a crystal-based high-harmonic source can emit lightwaves whose carrier fields are tailored by the crystal’s symmetry. This scheme might be exploited to ultimately generate attosecond waveforms directly from a crystal for the observation and control of ultrafast processes.

The results are reported in Nature Photonics 11, 227-231 (2017).

Press release (UR): in German/Deutsch
Press release (University of Michigan): in English
Press release (idw): in German/Deutsch
Press release (idw): in English




Direct observation of ultrafast exciton formation in a monolayer of WSe2

In a collaboration with the groups of Christian Schüller, Tobias Korn, and Alexey Chernikov we directly observed the ultrafast formation of excitons in a single atomic layer of tungsten diselenide with the help of sub-cycle multi-THz spectroscopy.

The results are reported in Nano Letters, doi:10.1021/acs.nanolett.6b04422 .




Lightning-fast switch for polariton waves

In collaboration with the groups of Prof. Dr. Miriam S. Vitiello in Pisa and Prof. Dr. Jaroslav Fabian here at the University of Regensburg, we have demonstrated an ultrafast switch for polariton waves, which could allow us to speed up future electronics many times over.

The results are reported in Nature Nanotechnology 12, 207-211 (2017).

This work has also been featured in a News and Views Article "Quantum materials: The quest for ultrafast plasmonics" by D. N. Basov and M. M. Fogler, Nature Nanotechnology 12, 187-188 (2017).

Press release (UR): in German/Deutsch
Press release (idw): in German/Deutsch
Press release (idw): in English

The study has also been featured in the Mittelbayerische Zeitung (print version of Dec 15th, 2016 and online).

Furthermore, a feature article has been written by Dexter Johnson for IEEE Spectrum.


Ultrafast slow-motion microscope sees a single molecule vibrate

Together with the group of Prof. Dr. Jascha Repp from Regensburg, we have managed to take the first femtosecond snapshot of an individual molecular orbital and watch a single molecule’s ultrafast motion directly in space and time.

The results are reported in Nature 539, 263–267 (2016).

This work has been featured in a News and Views Article "Nanoscience: Single-molecule instant replay" by N. Camillone III, Nature 539, 170–171 (2016).

Press release: in German/Deutsch
Press release: in English

Featured in the Frankfurter Allgemeine Zeitung (print version of Nov 16th, 2016 and online)


Terahertz-driven nonlinear spin response in nickel oxide

Our latest report on nonlinear THz interaction with electron spins in antiferromagnetic NiO has been featured as an Editor's Choice in Science.

Please find the main paper here: Phys. Rev. Lett. 117, 197201 (2016).
Here you can read the featured article in Science: Science 354, 1018 (2016).




Terahertz electric field shakes a magnet

In collaboration with our colleagues from Nijmegen, Moscow and Berlin we have successfully demonstrated a novel ultrafast and highly efficient way to control electron spins by electromagnetic waves oscillating at terahertz frequencies. Our results may be used for the realization of next-generation information storage devices, working 10000 times as fast as current hard drives.

The new concept is published in Nature Photonics 10, 715-718 (2016).

Press release: in English
Press release: in German/Deutsch





Dominik Peller receives best talk award

  


Dominik Peller has been awarded the prize for the best student talk given at the International Conference on Ultrafast Phenomena 2016 in Santa Fe. At the meeting, he was selected to present the group’s latest results on ultrafast scanning tunneling microscopy in a postdeadline contribution: Watching a single molecular orbital move.





Markus A. Huber meets 29 Nobel Laureates

Markus A. Huber qualified in a global competition among young scientists to give one of only two invited non-Laureate talks at the 66th Nobel Laureate Meeting in Lindau. At the meeting, he presented the group's work on Ultrafast near-field microscopy - watching electrons oscillate on the nanoscale as part of the traditional Bavarian evening.

Press release: in German/Deutsch
See also: Article of the Bayerische Kultusministerium StMBW




Best lecture award

Prof. Huber's new lecture "Light matter interaction" has been awarded the prize for the best physics lecture at the University of Regensburg during the summer term 2016.




A quasiparticle collider

Our standard model of the smallest bits of matter rests upon evidence gathered from particle accelerators and collider experiments. In an international collaboration with partners from Regensburg (Germany), Marburg (Germany), and Santa Barbara (USA) we have now realized a collider for particles in solids. This new concept provides key insights into the complex constituents of solids and may ultimately lead to the clarification of some of the most outstanding enigmas of condensed matter physics such as the nature of high temperature superconductivity.

The results are reported in Nature 533, 225-229 (2016).

This work has been featured in a News and Views Article "Quantum-matter physics: Quasiparticles on a collision course" by D. van der Marel, Nature 533, 186-187 (2016).

You can also listen to a commentary about this work on Nature Podcast!

Press release: in German/Deutsch
Press release: in English


more news...
 


Latest News

October 2018
Dr. Jessica Boland starts as a Lecturer at the Photon Science Institute of the University of Manchester.

September 17, 2018
Rupert Huber elected as OSA Fellow.

May 15, 2018

April 27, 2018
40 Mio Euros for the new research building RUN have been approved.

March 27, 2018
Alexey Chernikov receives Heinz Maier-Leibniz prize.

January 2018
Tyler L. Cocker becomes assistant professor at Michigan State University.