Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 49: Poster – Photonics, Lasers, and Applications
Q 49.40: Poster
Wednesday, March 12, 2025, 17:00–19:00, Tent
Towards three-dimensional confinement of the electron beam inside dielectric laser accelerators — •Manuel Konrad1, Stefanie Kraus1, Leon Brückner1, Julian Litzel1, Zhexin Zhao1, Tomas Chlouba1,2, Roy Shiloh1,3, and Peter Hommelhoff1,4 — 1Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen — 2Center for Nanophotonics, AMOLF, 1098 XG Amsterdam — 3Institute of Applied Physics, Hebrew University of Jerusalem (HUJI), Jerusalem, Israel — 4Department Physik, Ludwig-Maximilians-Universität München (LMU), 80799 München
While classical particle accelerators typically utilize metal cavities driven by radio-frequency fields to create the accelerating fields, dielectric laser accelerators (DLA) adapt the same concepts to dielectric structures driven by high repetition rate laser pulses. Alternating phase focusing (APF) is employed so that the electron beam stays confined inside the acceleration channel [1]. After we successfully applied this concept to gain phase space control over the electron in one longitudinal and one transversal direction [2], we have recently shown coherent acceleration of electrons. By keeping the beam confined in a 500 um long structure, we were able to accelerate the electrons from 28.4 to 40.7 keV in a scanning electron microscope [3]. We will show how the APF scheme can be expanded to full 3D confinement and discuss how it is affected by illuminating the structure from the top.
[1] Niedermayer et al., PRL 121, 214801 (2018) [2] Shiloh et al., Nature 597, 498 (2021) [3] Chlouba et al., Nature, 622, 476 (2023)
Keywords: Accelerator; Dielectric; Laser; nanophotonic; Acceleration