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Talk - Peter Hommelhoff: Strong-field physics inside of graphene and at the surface of metal needle tips

22.02.2019 | Grete Flarup

Dato tor 21 mar
Tid 13:15 14:00
Sted 1525-626

Speaker: Peter Hommelhoff, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany

Abstract: We will discuss strongly driven electrons inside of the semi-metal graphene. We observe coupled intra-band motion and interband transitions when we focus phase-stable two-cycle laser pulses at a graphene ribbon. Based on the waveform-dependence of the induced currents and tight-binding simulations, we can identify the underlying mechanism as Landau-Zener-Stückelberg interferometry, so repeated coherent Landau-Zener transistions leading to the waveform-dependent excitation of a net current. Furthermore we will discuss recent two-color effects in strong-field photoemission at metal needle tips.

Institut for Fysik og Astronomi, Medarbejdere, Offentligheden / Pressen, Ph.d.-studerende
Talk_by_Prof_Hommelhoff.ics (39 Kb)