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Landau-Zener-Stückelberg interferometer on attosecond timescales in graphene
Author(s): Takuya Higuchi; Christian Heide; Konrad Ullmann; Heiko B. Weber; Peter Hommelhoff
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Paper Abstract

When solids are exposed to intense optical fields, the intraband electron motion may influence interband transitions, potentially causing a transition of light-matter interaction from a quantum (photon-driven) regime to a semi-classical (field-driven) regime. We demonstrate this transition in monolayer graphene. We observe a carrier-envelope-phasedependent current in graphene irradiated with phase-stable two-cycle laser pulses, showing a striking reversal of the current direction as a function of the driving field amplitude at ~2 V/nm. This reversal indicates the transition into the field-driven (or strong-field) regime. We show furthermore that in this regime electron dynamics are governed by suboptical-cycle Landau-Zener-Stückelberg interference, comprised of coherent repeated Landau-Zener transitions. We expect these results to have direct ramifications for light-wave driven electronics in graphene.

Paper Details

Date Published: 22 February 2018
PDF: 4 pages
Proc. SPIE 10530, Ultrafast Phenomena and Nanophotonics XXII, 105300Z (22 February 2018); doi: 10.1117/12.2289540
Show Author Affiliations
Takuya Higuchi, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Christian Heide, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Konrad Ullmann, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Heiko B. Weber, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Peter Hommelhoff, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)

Published in SPIE Proceedings Vol. 10530:
Ultrafast Phenomena and Nanophotonics XXII
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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