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dc.contributor.authorWang, Y. H.
dc.contributor.authorSteinberg, Hadar
dc.contributor.authorJarillo-Herrero, Pablo
dc.contributor.authorGedik, Nuh
dc.date.accessioned2014-07-18T14:10:27Z
dc.date.available2014-07-18T14:10:27Z
dc.date.issued2013-10
dc.identifier.issn0036-8075
dc.identifier.issn1095-9203
dc.identifier.urihttp://hdl.handle.net/1721.1/88434
dc.description.abstractThe unique electronic properties of the surface electrons in a topological insulator are protected by time-reversal symmetry. Circularly polarized light naturally breaks time-reversal symmetry, which may lead to an exotic surface quantum Hall state. Using time- and angle-resolved photoemission spectroscopy, we show that an intense ultrashort midinfrared pulse with energy below the bulk band gap hybridizes with the surface Dirac fermions of a topological insulator to form Floquet-Bloch bands. These photon-dressed surface bands exhibit polarization-dependent band gaps at avoided crossings. Circularly polarized photons induce an additional gap at the Dirac point, which is a signature of broken time-reversal symmetry on the surface. These observations establish the Floquet-Bloch bands in solids and pave the way for optical manipulation of topological quantum states of matter.en_US
dc.description.sponsorshipUnited States. Dept. of Energy (Award DE-FG02-08ER46521)en_US
dc.description.sponsorshipUnited States. Dept. of Energy (Award DE-SC0006423)en_US
dc.description.sponsorshipUnited States. Army Research Office (Grant W911NF-09-1-0170)en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Division of Materials Sciences and Engineering (Award DE-SC0006418)en_US
dc.language.isoen_US
dc.relation.isversionofhttp://dx.doi.org/10.1126/science.1239834en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titleObservation of Floquet-Bloch States on the Surface of a Topological Insulatoren_US
dc.typeArticleen_US
dc.identifier.citationWang, Y. H., H. Steinberg, P. Jarillo-Herrero, and N. Gedik. “Observation of Floquet-Bloch States on the Surface of a Topological Insulator.” Science 342, no. 6157 (October 25, 2013): 453–457.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorWang, Y. H.en_US
dc.contributor.mitauthorSteinberg, Hadaren_US
dc.contributor.mitauthorJarillo-Herrero, Pabloen_US
dc.contributor.mitauthorGedik, Nuhen_US
dc.relation.journalScienceen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsWang, Y. H.; Steinberg, H.; Jarillo-Herrero, P.; Gedik, N.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-6394-4987
dc.identifier.orcidhttps://orcid.org/0000-0001-8217-8213
mit.licenseOPEN_ACCESS_POLICYen_US


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