Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 35: Ultrakurze Laserpulse: Anwendungen 2

Q 35.5: Talk

Wednesday, March 16, 2011, 15:30–15:45, SCH A01

Photonic structure-based acceleration of non-relativistic electrons — •John Breuer and Peter Hommelhoff — Max-Planck-Institut für Quantenoptik, Garching, Deutschland

Laser-based electron acceleration is an intriguing tool for small-size particle accelerators, but also for precise temporal control of non-relativistic electrons. Our concept is based on periodic electric field reversal, thus the electrons are accelerated directly by the laser electric field (proposed in [1]). We illuminate a fused-silica transmission grating with Titanium:sapphire femtosecond pulses in order to excite evanescent spatial modes which propagate synchronously with 30 keV electrons. Numerical simulations show expected accelerating gradients of up to 60 MeV/m and an energy gain of around 300 eV at a distance of 100 nm away from the grating surface. We will describe our experimental setup, present first results and discuss possible applications.

[1] T. Plettner, R. L. Byer et al., PRSTAB, 9, 111301 (2006)