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Observation of suppressed terahertz absorption in photoexcited graphene

dc.contributor.authorFrenzel, Alex James
dc.contributor.authorLui, Chun Hung
dc.contributor.authorFang, Wenjing
dc.contributor.authorNair, Nityan L.
dc.contributor.authorHerring, Patrick Kenichi
dc.contributor.authorJarillo-Herrero, Pablo
dc.contributor.authorKong, Jing
dc.contributor.authorGedik, Nuh
dc.date.accessioned2014-05-22T18:22:29Z
dc.date.available2014-05-22T18:22:29Z
dc.date.issued2013-03
dc.date.submitted2013-01
dc.identifier.issn00036951
dc.identifier.issn1077-3118
dc.identifier.urihttp://hdl.handle.net/1721.1/87105
dc.description.abstractWhen light is absorbed by a semiconductor, photoexcited charge carriers enhance the absorption of far-infrared radiation due to intraband transitions. We observe the opposite behavior in monolayer graphene, a zero-gap semiconductor with linear dispersion. By using time domain terahertz (THz) spectroscopy in conjunction with optical pump excitation, we observe a reduced absorption of THz radiation in photoexcited graphene. The measured spectral shape of the differential optical conductivity exhibits non-Drude behavior. We discuss several possible mechanisms that contribute to the observed low-frequency non-equilibrium optical response of graphene.en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Office of Basic Energy Sciences (Grant DE-SC0006423)en_US
dc.description.sponsorshipNational Science Foundation (U.S.). Graduate Research Fellowship Programen_US
dc.description.sponsorshipUnited States. Air Force Office of Scientific Researchen_US
dc.description.sponsorshipUnited States. Office of Naval Research. Multidisciplinary University Research Initiative. Graphene Approaches to Terahertz Electronicsen_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Award DMR-0819762)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant ECS-0335765)en_US
dc.language.isoen_US
dc.publisherAmerican Institute of Physics (AIP)en_US
dc.relation.isversionofhttp://dx.doi.org/10.1063/1.4795858en_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 suppressed terahertz absorption in photoexcited grapheneen_US
dc.typeArticleen_US
dc.identifier.citationFrenzel, A. J., C. H. Lui, W. Fang, N. L. Nair, P. K. Herring, P. Jarillo-Herrero, J. Kong, and N. Gedik. “Observation of Suppressed Terahertz Absorption in Photoexcited Graphene.” Appl. Phys. Lett. 102, no. 11 (2013): 113111.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Scienceen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorFrenzel, Alex Jamesen_US
dc.contributor.mitauthorLui, Chun Hungen_US
dc.contributor.mitauthorFang, Wenjingen_US
dc.contributor.mitauthorNair, Nityan L.en_US
dc.contributor.mitauthorHerring, Patrick Kenichien_US
dc.contributor.mitauthorJarillo-Herrero, Pabloen_US
dc.contributor.mitauthorKong, Jingen_US
dc.contributor.mitauthorGedik, Nuhen_US
dc.relation.journalApplied Physics Lettersen_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.orderedauthorsFrenzel, A. J.; Lui, C. H.; Fang, W.; Nair, N. L.; Herring, P. K.; Jarillo-Herrero, P.; Kong, J.; Gedik, N.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-3416-3962
dc.identifier.orcidhttps://orcid.org/0000-0002-6394-4987
dc.identifier.orcidhttps://orcid.org/0000-0003-0551-1208
dc.identifier.orcidhttps://orcid.org/0000-0002-7406-5283
dc.identifier.orcidhttps://orcid.org/0000-0001-8217-8213
mit.licenseOPEN_ACCESS_POLICYen_US
mit.metadata.statusComplete


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