Josef Freudenstein

Do you want to fight climate change? Then you should build better solar cells! For this, perovskites are setting new records, but why? Happy to see my colleagues investigate that question with nanoscale spatial and subcycle temporal resolution: nature.com/articles/s4156…

Using ultrafast THz nanoscopy, we resolved the interplay between surface morphology, crystallographic phase, and vertical carrier dynamics in metal halide perovskites. Fantastic collaboration with Michael Johnston's group @UniofOxford. @NaturePhotonics nature.com/articles/s4156…

Some work from my time in Regensburg, in the @Huber_Group. We worked out how to measure the coherent emission from tunnelling electrons, this lets us do ultrafast optical microscopy now at the atomic scale! nature.com/articles/s4158…

It is here! The result of years of hard work together with a great team.🥳🥳 Check out how we were able to bring optical microscopy to the atomic scale and use this to sample subcycle tunnelling currents directly in the time domain: nature.com/articles/s4158…

We have discovered a quantum-mechanical contrast mechanism that enables all-optical microscopy to achieve atomic resolution while retaining subcycle precision. This new concept allows us to trace electrons on their intrinsic length and time scales. nature.com/articles/s4158…

Our latest results have just been published 🥳 Please check out how we have brought all-optical microscopy to the atomic scale. nature.com/articles/s4158…

It is a great pleasure to see the hard work of my colleagues and friends finally published! If you have ever wondered what the subcycle structure of atomically confined tunnel currents looks like, you should take a look at this amazing work: nature.com/articles/s4158…

I am excited to share that I have been selected for the upcoming Lindau Nobel Laureate Meeting @lindaunobel! I look forward to this incredible opportunity to engage with Nobel Laureates and fellow young scientists. Special thanks to @uni_regensburg and @Huber_Group😊 #LINO24

We develop ultrafast lightwave-driven scanning tunnelling spectroscopy to investigate how the spin-orbit-split energy levels of an isolated Se vacancy within a WSe2 monolayer shift under phonon displacement. Read the full story in @NaturePhotonics. nature.com/articles/s4156…

Quantum dance to the beat of a drum: physicists at the University of Regensburg choreograph the shift of a quantized electronic energy level with atomic oscillations faster than a trillionth of a second. Read the full story in @NaturePhotonics. nature.com/articles/s4156…

Congratulations to our @JosefFreud for winning the student paper award at #IRMMWTHz2023 in a very strong field of participants. Very well done!

We had the opportunity to write a Review on "Lightwave electronics in condensed matter" in @NatRevMater together with our long-standing friends @UMich @UMichECE: doi.org/10.1038/s41578…

Die Photovoltaik-Anlage der Zukunft: Perowskit statt Silizium? Die neue Folge des Podcasts GASTHÖRER behandelt das Thema „Sonnenenergie von der Zeltplane? Photovoltaik mit Svenja Nerreter“ – erhältlich, überall wo es Podcasts gibt. sohub.io/pae1

Desperately looking for someone who had an experience with measuring van der Waals samples under high pressure with DAC...

Not just an Iron Man in the lab, but also on the track! Our @JosefFreud finished the @ChallengeRoth with an incredible time of 10:55:27⚡️ Congratulations from the whole @Huber_Group. We are very proud of you 👏

Great conference in a beautiful place! Ultrafast dynamics and bandgap photonics in #Crete with outstanding speakers including Nobel Prize winner Donna Strickland. Was exciting to hear the latest on #ultrafast control of #quantum #materials and more!

Congratulations, Svenja Nerreter (@Svenja_Nerreter, @uni_regensburg) from the 2023 Class of Women Scholars! Svenja is researching ultrafast nanoscopy, studying charge-carrier dynamics in materials for next-gen optoelectronics. Meet the entire Class - ow.ly/LXTs50Os1iA

I wrote a brief bit on a cool paper that came out last month in Nature. nature.com/articles/s4156…

Great work by the Hommelhoff group on attosecond electron emission from a metal tip! nature.com/articles/s4158…

Researchers from @SFB1083 as well as from the @Huber_Group and from all over Europe observed the ultrafast emergence of a Floquet-Bloch band structure for the first time. Congratulations for publishing the results in Nature! More details: internal-interfaces.de/2023/04/12/ele…