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dc.contributor.authorCharnukha, A
dc.contributor.authorSternbach, A
dc.contributor.authorStinson, HT
dc.contributor.authorSchlereth, R
dc.contributor.authorBrüne, Christoph
dc.contributor.authorMolenkamp, Laurens W
dc.contributor.authorBasov, DN
dc.date.accessioned2020-01-16T07:24:29Z
dc.date.available2020-01-16T07:24:29Z
dc.date.created2019-11-06T16:21:39Z
dc.date.issued2019
dc.identifier.issn2375-2548
dc.identifier.urihttp://hdl.handle.net/11250/2636531
dc.description.abstractThe observation of ultrarelativistic fermions in condensed-matter systems has uncovered a cornucopia of novel phenomenology as well as a potential for effective ultrafast light engineering of new states of matter. While the nonequilibrium properties of two- and three-dimensional (2D and 3D) hexagonal crystals have been studied extensively, our understanding of the photoinduced dynamics in 3D single-valley ultrarelativistic materials is, unexpectedly, lacking. Here, we use ultrafast scanning near-field optical spectroscopy to access and control nonequilibrium large-momentum plasmon-polaritons in thin films of a prototypical narrow-bandgap semiconductor Hg0.81Cd0.19Te. We demonstrate that these collective excitations exhibit distinctly nonclassical scaling with electron density characteristic of the ultrarelativistic Kane regime and experience ultrafast initial relaxation followed by a long-lived highly coherent state. Our observation and ultrafast control of Kane plasmon-polaritons in a semiconducting material using light sources in the standard telecommunications fiber-optics window open a new avenue toward high-bandwidth coherent information processing in next-generation plasmonic circuits.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Association for the Advancement of Sciencenb_NO
dc.rightsNavngivelse-Ikkekommersiell 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/deed.no*
dc.titleUltrafast nonlocal collective dynamics of Kane plasmon-polaritons in a narrow-gap semiconductornb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.volume5nb_NO
dc.source.journalScience Advancesnb_NO
dc.source.issue8nb_NO
dc.identifier.doi10.1126/sciadv.aau9956
dc.identifier.cristin1744686
dc.description.localcodeCopyright © 2019The Authors, somerights reserved;exclusive licenseeAmerican Associationfor the Advancementof Science. No claim tooriginal U.S. GovernmentWorks. Distributedunder a CreativeCommons AttributionNonCommercialLicense 4.0 (CC BY-NC).nb_NO
cristin.unitcode194,66,20,0
cristin.unitnameInstitutt for fysikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.fulltextoriginal
cristin.qualitycode1


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