Hannover 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 58: Poster: Quantum Optics and Photonics IV

Q 58.54: Poster

Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof

Nanostructured laser-driven dielectric structures for electron focusing — •Alexander Tafel, Joshua McNeur, Martin Kozák, Ang Li, Norbert Schönenberger, and Peter Hommelhoff — Friedrich-Alexander-Universität

By combining the strong fields of ultrashort laser pulses and the large damage thresholds of dielectrics, dielectric laser accelerators (DLAs) hold great potential to reduce the size and cost of existant accelerators dramatically. Acceleration and deflection have already been demonstrated in several proof of principle experiments in a single stage [1,2,3]. To extend the interaction between electrons and the laser-induced fields, however, focusing elements must be introduced to counteract the divergence of the electron beam. Here, we present two candidates for this role: dielectric laser quadrupole structures - a setup of two 2D gratings - which work analogously to radio frequency quadrupoles and single-grating based electron lenses. The former can be used for strong focusing and simultaneous acceleration, microbunching and/or guiding of the beam. The latter have already shown to be effective electron focusing elements with focal distances on the order of 100 microns [4].

[1] J. Breuer and P. Hommelhoff, Phys. Rev. Lett. 111, 134803 (2013).

[2] E. A. Peralta et al. Nature 503, 91-94 (2013).

[3] M. Kozak, J. McNeur et al., submitted

[4] J, McNeur, M. Kozak et al., submitted