Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics III
Q 62.93: Poster
Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer
Geometries and Materials for Laser-Based Particle Acceleration at Dielectric Structures — •Alexander Tafel1, Joshua McNeur1, Kenneth Leedle2, Ang Li1, James Harris2, and Peter Hommelhoff1 — 1Department of Laserphysics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Germany — 2Department of Electrical Engineering, Stanford University, USA
Dielectric Laser Acceleration (DLA) has evolved quickly during the last few years. Successful experiments have been conducted with electron energies as low as 28 keV, accelerating gradients as high as 375 MeV/m and deflection angles of 8 mrad.[1],[2]. Here, we discuss anodic alumina honeycomb nanostructures that are being investigated for future DLA experiments. These nanostructures are periodic in two dimensions, resulting in field patterns and particle trajectories potentially leading to transverse microbunching. Moreover, the damage threshold of alumina in the NIR is high (4.9 J/cm2)[3], enabling high accelerating field strengths in the range of 10 GV/m. Lastly, new laser-triggered electron field emission sources with ultrashort bunch lengths are under development at FAU and discussed.
[1] J. Breuer, P. Hommelhoff, Phys. Rev. Let., 111, 134803 (2013).
[2] K. Leedle et al., to be published.
[3] K. Soong et al., AIP Conference Proceedings, 1507, 511 (2012).