Funding period: 2021 – 2024

Project leader: Peter Baum

Scientific staff: Dr. Yiqi Fang, Daniel Kazenwadel, Joel Kuttruff, David Nabben, Atal Swain

Former members: Yenan Meng, Mikhail Volkov

Ultrafast and ultrasmall dimensions in space and time are decisive for almost any spontaneous change in complex materials. Here we advance ultrafast electron microscopy to the regime where naturally occurring spatiotemporal phenomena can be studied without any dedicated laser excitation. Given electron microscopy’s wide applicability to a large variety of specimen, we hope that this development might become a widespread approach for better understanding fluctuation-driven reaction dynamics in complex materials in which atomic structure, spin and electrodynamics are strongly interlinked.

List of publications

Current preprints

• Terahertz control in a transmission electron microscope
  J. Kuttruff, D. Nabben, A. Zimmermann, A. Ryabov, P. Baum
  arXiv:2402.12007 - published 19 February 2024
  Sci. Adv. under review (2024)
  also related to project A04

2024

• Femtosecond electron beam probe of ultrafast electronics
  M. Mattes, M. Volkov, and P. Baum
  Nature Comm. 15, 1743 - published 26 February 2024

2023

• Determination of the nearest-neighbor interaction in VO2 via fractal dimension analysis
  J. Holder, D. Kazenwadel, P. Nielaba, and P. Baum
  Phys. Rev. Research 5, 043272 – published 20 December 2023
   
• Cooling times in femtosecond pump-probe experiments of phase transitions with latent heat
  D. Kazenwadel, N. Neathery, S. Prakash, A. Ariando, and P. Baum
  Phys. Rev. Research 5, 043077 – published 23 October 2023
   
• Real-Time Electron Clustering in an Event-Driven Hybrid Pixel Detector
  J. Kuttruff, J. Holder, Y. Meng, and Peter Baum
  Ultramicroscopy 255, 113864  - published 5 October 2023
  related also to project  A04
   
• Liquid-diffusion-limited growth of vanadium dioxide single crystals
  N. Sprinkart, D. Kazenwadel, R. Hartmann, and P. Baum
  Phys. Rev. Res. 5, 013028 - published 20 January 2023

2022

• Spatiotemporal Attosecond Control of Electron Pulses via Subluminal Terahertz Waveforms
  M. Volkov, E. Ramachandran, M. Mattes, A. B. Swain, M. Tsarev, and P. Baum
  ACS Photonics 2022, 9, 3225–3233 – published 6 October 2022
  related also to project  A04
   
• Free-Electron Tomography of Few-Cycle Optical Waveforms
  Y. Morimoto, B.-H. Chen, and P. Baum
  Ann. Phys. 2022, 2200193  – published 09 September 2022
  related also to project  A04
   
• Polarized phonons carry angular momentum in ultrafast demagnetization
  S. R. Tauchert, M. Volkov, D. Ehberger, D. Kazenwadel, M. Evers, H. Lange, A. Donges, A. Book, W. Kreuzpaintner, U. Nowak, and P. Baum
  Nature, 602, 73 – published 2 February 2022
  related also to projects B02 and B06
  article in campus.kn

2021

• Magneto-Optical Activity in Nonmagnetic Hyperbolic Nanoparticles
  J. Kuttruff, A. Gabbani, G. Petrucci, Y. Zhao, Ma. Iarossi, E. Pedrueza-Villalmanzo, A. Dmitriev, A. Parracino, G. Strangi, F. De Angelis, D. Brida, F. Pineider, and N. Maccaferri
  Phys. Rev. Lett. 127, 217402 – published 19 November 2021
   
• Jitter-free terahertz pulses from LiNbO3
  J. Kuttruff, M. V. Tsarev, and P. Baum
  Opt. Lett. 12, 2944 – published 15 June 2021

Further Publications

• Tip-Induced Inversion of the Chirality of a Molecule's Adsorption Potential Probed by the Switching Directionality
  A. Bauer, M. Maier, W. M. Schosser, J. Diegel, F. Paschke, Y. Dedkov, F. Pauly, R. F. Winter, and M. Fonin
  Science 352, 6284, 429 - published 22 April 2016
   
• Tilted Electron Pulses
  D. Ehberger, A. Ryabov, and P. Baum
  Phys. Rev. Lett. 121, 094801 – published 29 August 2018
   
• Diffraction and microscopy with attosecond electron pulse trains
  Y. Morimoto, and P. Baum 
  Nature Physics 14, 252 - published 27 November 2017
   
• Electron microscopy of electromagnetic waveforms​​​​​​​
  A. Ryabov, and P. Baum
  Science 353, 6297, 374 - published 22 July 2016