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Ultrafast nonlinear optical response of Dirac fermions in graphene

dc.contributor.authorBaudisch, Matthias
dc.contributor.authorMarini, Andrea
dc.contributor.authorCox, Joel D.
dc.contributor.authorZhu, Tony
dc.contributor.authorSilva, Francisco
dc.contributor.authorTeichmann, Stephan
dc.contributor.authorMassicotte, Mathieu
dc.contributor.authorKoppens, Frank
dc.contributor.authorLevitov, Leonid S.
dc.contributor.authorGarcía de Abajo, F. Javier
dc.contributor.authorBiegert, Jens
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2018-03-15T09:57:25Z
dc.date.available2018-03-15T09:57:25Z
dc.date.issued2018-03-09
dc.identifier.citationBaudisch, M. [et al.]. Ultrafast nonlinear optical response of Dirac fermions in graphene. "Nature Communications", 9 Març 2018, vol. 9, núm. 1018, p. 1-6.
dc.identifier.urihttp://hdl.handle.net/2117/115206
dc.description.abstractThe speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting in a million-fold increase from state-of-the-art technology. In graphene, charge carrier manipulation is facilitated by exceptionally strong coupling to optical fields, from which stems an important back-action of photoexcited carriers. Here we investigate the instantaneous response of graphene to ultrafast optical fields, elucidating the role of hot carriers on sub-100 fs timescales. The measured nonlinear response and its dependence on interaction time and field polarization reveal the back-action of hot carriers over timescales commensurate with the optical field. An intuitive picture is given for the carrier trajectories in response to the optical-field polarization state. We note that the peculiar interplay between optical fields and charge carriers in graphene may also apply to surface states in topological insulators with similar Dirac cone dispersion relations.
dc.format.extent6 p.
dc.language.isoeng
dc.publisherNature
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshGraphene
dc.subject.othergraphene
dc.titleUltrafast nonlinear optical response of Dirac fermions in graphene
dc.typeArticle
dc.subject.lemacGrafè
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.nature.com/articles/s41467-018-03413-7
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidSEV-2015- 0522
dc.relation.projectidFIS2014-56774-R
dc.relation.projectidFIS2014-51478-ERC
dc.relation.projectidEU-H2020 654148
dc.relation.projectid641272
upcommons.citation.publishedtrue
upcommons.citation.publicationNameNature Communications
upcommons.citation.volume9
upcommons.citation.number1018
upcommons.citation.startingPage1
upcommons.citation.endingPage6
dc.identifier.pmid29523791


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