Year: 2024

We demonstrate that electrons inside a crystal driven by ultrashort and intense laser pulses act as an extremely precise ruler for the crystal’s electronic structure. When subjected to the optical field of the laser pulses, the electrons navigate through the crystal on a timescale of a single femtos...

The article explores the fascinating world of high-energy physics and the role of innovative accelerator concepts. Within the framework of the I.FAST project, this also involved the generation of fast single electrons at gigahertz repetition rates for the search for dark matter using dielectric lase...

Delay line detectors have the advantage of being able to detect the position and time of particle events with high precision while also being multi-hit capable. Our article presents a novel machine learning approach to enhance the spatiotemporal resolution of delay line detectors for multi-event re...

Particle accelerators are indispensable for research, medicine and industry. We have developed a miniature particle accelerator that accelerates and guides electrons through nanostructures using laser light. In an interview in Welt der Physik (German), Prof. Dr. Hommelhoff and Stefanie Kraus repo...

Needle tips are known to be the electron source with the highest beam quality. However, due to their small size, the emitted current is limited. Combining the emission of multiple tips should allow for high currents while still providing appreciable beam quality. We have fabricated and measured an a...

How do the electron number statistics behave when classical light and non-classical light are used to trigger non-linear photoemission from nanometer-sized metal tips? We discuss this question in our recently published manuscript in Nature Physics, which can be read here. For more details see als...

The ACHIP research program, generously supported by the Californian Gordon and Betty Moore Foundation with around 20 million euros, has come to an end. ACHIP stands for "Accelerator on a Chip International Program". It has funded research into this type of laser-based accelerator and allowed us to m...

Our Master's student Julian Freier has been awarded the contribution prize of the German Physical Society's Radiation and Medical Physics Association at this year's DPG Spring Meeting in Berlin. He received the award for his poster titled "Cell Irradiation Experiments and Film Dosimetry with Low Ene...

UCLA Professor Sergio Carbajo has won one of the highly competitive Humboldt Research Fellowships. This will allow him to visit us for up to a year to conduct research with us. Congratulations! We are looking forward to the visit!