Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 28: Poster – Quantum Optics
Q 28.29: Poster
Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG
Optimization of electrode design for future interaction-free-measurements with electrons — •FABIAN BAMMES1, FRANZ SCHMIDT-KALER1, NILS BODE1, MICHAEL SEIDLING1, ROBERT ZIMMERMANN1, LARS RADTKE1, JUSTUS WALTHER1, and PETER HOMMELHOFF1,2 — 1Erlangen-Nürnberg (FAU), Staudtstrasse 1, D-91058 Erlangen, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität, D-80799 München, Germany
True single particle observation of biological samples at atomic resolution is currently limited by radiation damage and low sample contrasts. Both challenges can be overcome with novel observation techniques established in the optical regime, namely interaction-free measurements (IFM) reducing damage, -and multi-pass experiments optimizing low sample contrast. Transferring detection from photons to charged particles potentially increases lateral resolution. IFM with electrons will be realized in a quantum electron microscope (QEM) employing three individual electron-optical components, namely electron guide, splitter and beam resonator. All three of them have been demonstrated individually with planar electrostatic electrode arrays using the auto-ponderomotive principle. We operated at primary energies of up to 9.5keV for guiding, 1.7keV for splitting and 50eV for resonating electron beams. Current work focuses on deceleration on-a-chip, as well as the geometric optimization to reduce losses and improve the pseudo-potential symmetry.
Keywords: matter wave optics; electron beam manipulation; auto-ponderomotive; paul mass filter; interaction-free measurement