Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 52: Ultrashort Laser Pulses II

Q 52.2: Vortrag

Donnerstag, 3. März 2016, 14:45–15:00, a310

Attosecond electron gating and streaking by optical fields — •Martin Kozák, Joshua McNeur, Norbert Schönenberger, Alexander Tafel, Ang Li, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstrasse 1, 91058 Erlangen

We report on recent experimental results of sub-optical cycle temporal gating and streaking of free electrons at sub-relativistic energies (25-30 keV). In our experiments, the energy and transverse momentum of a DC electron beam is modulated in time by the interaction with the optical near-fields of a dielectric nanostructure utilizing the inverse Smith-Purcell effect [1,2]. As this interaction is linear with the electric field, the sub-cycle temporal structure of the femtosecond laser pulse is imprinted to the electron beam with very high precision (200 attoseconds in our experiment). Combined with a high-pass energy filter for accelerated electrons, this technique will enable sub-cycle temporal resolution in ultrafast electron diffraction and microscopy experiments (1.3 fs demonstrated). Moreover, the simple variation of the setup will serve as an attosecond streak camera for charged particle beams, potentially offering 10 as temporal resolution.

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

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