Erlangen 2018 – scientific programme

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P: Fachverband Plasmaphysik

P 21: Laser Plasmas - Poster

P 21.3: Poster

Wednesday, March 7, 2018, 16:15–18:15, Zelt West

The influence of the CEP on the electrons emitted from a laser plasma created on a solid surface — Florian Kleeschulte, •Maximilian Münzberg, and Georg Pretzler — Heinrich-Heine-Universität Düsseldorf

We present experiments in which ultrashort laser pulses (7 fs FWHM) were focused to intensities of ≈ 5·10¹⁷ W/cm² on flat aluminum targets. We measured the spectra of the ejected electrons with angular resolution, obtaining energies up to 400 keV. The carrier-envelope-phase (CEP) was stabilized, and when the laser CEP was varied, we observed a strong variation of the total number of emitted electrons of the order of a few tens of percent, which is to our knowledge the first time such a strong effect is detected in this interaction regime. We present a theoretical model which might explain this unexpected effect, and we discuss further possibilities.