Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics V

Q 62.99: Poster

Thursday, March 8, 2018, 16:15–18:15, Redoutensaal

Novel laser-driven photonic structures for high efficiency electron acceleration — •Peyman Yousefi, Joshua McNeur, Martin Kozák, Norbert Schönenberger, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstr. 1, 91058 Erlangen

Dielectric laser acceleration (DLA) has proven to be a reliable concept for future table-top particle accelerators. In DLA, electrons traverse the accelerating near fields excited by ultrafast lasers impinging on dielectric nanostructures. Acceleration of electrons with varying energies has been demonstrated with gradients approaching 1 GeV/m [1]. To realize longer interaction length over multiple stages, structures that efficiently convert the incoming laser field into the accelerating mode are critical. A dual pillar grating, described here, has proven to be a good candidate for high efficiency acceleration. Further, it provides a proper symmetry in the field profile and reduces the deflecting forces. Here we present electron acceleration with a dual pillar silicon grating using a distributed Bragg reflector (DBR). We address the effect of DBR on the acceleration gradient and also report on a new geometry of dual pillars for higher acceleration gradients.

1.England, R. J.et al. Dielectric laser accelerators. Rev.Mod. Phys. 86, 1337 (2014).