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Optical spectroscopy of bilayer graphene

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dc.contributor.authorGeng, Baisong-
dc.contributor.authorHorng, Jason-
dc.contributor.authorZhang, Yuanbo-
dc.contributor.authorTang, Tsung-Ta-
dc.contributor.authorPark, Cheol-Hwan-
dc.contributor.authorGirit, Caglar-
dc.contributor.authorHao, Zhao-
dc.contributor.authorMartin, Michael-
dc.contributor.authorZettl, Alex-
dc.contributor.authorCrommie, Michael-
dc.contributor.authorLouie, Steven-
dc.contributor.authorWang, Feng-
dc.date.accessioned2024-05-16T01:17:52Z-
dc.date.available2024-05-16T01:17:52Z-
dc.date.created2023-05-10-
dc.date.created2023-05-10-
dc.date.created2023-05-10-
dc.date.issued2010-12-
dc.identifier.citationPhysica Status Solidi (B): Basic Research, Vol.247 No.11-12, pp.2931-2934-
dc.identifier.issn0370-1972-
dc.identifier.urihttps://hdl.handle.net/10371/202358-
dc.description.abstractInfrared spectroscopy reveals unusual tunable electronic structure and optical behaviour in electrically gated bilayer graphene. In a dual-gate bilayer graphene device, we were able to control the carrier doping and a semiconductor bandgap independently by using different combinations of the top and bottom gate voltages. The field-induced bandgap can be probed directly through the emerging interband transitions in infrared absorption spectra. A tunable bandgap up to 250 meV has been observed in our dual-gate bilayer graphene devices. This unique tunable bandgap can lead to many new physical phenomena. One example is an unusual phonon-exciton Fano resonance when the electronic bandgap is tuned to match the phonon vibration energy. Here (continuous) electron-hole transitions and (discrete) phonon vibrations form a coupled system described by the Fano resonance, and the infrared absorption spectra exhibit characteristic quantum interference between the phonon and exciton transitions. Remarkably, this coupled phonon-exciton Fano resonance can be continuously tuned through electrical gating in bilayer graphene, and its behaviour is described quantitatively by theory. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.-
dc.language영어-
dc.publisherJohn Wiley & Sons Ltd.-
dc.titleOptical spectroscopy of bilayer graphene-
dc.typeArticle-
dc.identifier.doi10.1002/pssb.201000324-
dc.citation.journaltitlePhysica Status Solidi (B): Basic Research-
dc.identifier.wosid000285798400070-
dc.identifier.scopusid2-s2.0-78649708299-
dc.citation.endpage2934-
dc.citation.number11-12-
dc.citation.startpage2931-
dc.citation.volume247-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorPark, Cheol-Hwan-
dc.type.docTypeArticle;Proceedings Paper-
dc.description.journalClass1-
dc.subject.keywordAuthorBilayer graphene-
dc.subject.keywordAuthorFano resonance-
dc.subject.keywordAuthorInfrared spectroscopy-
dc.subject.keywordAuthorTunable bandgap-
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  • College of Natural Sciences
  • Department of Physics and Astronomy
Research Area Condensed Matter Physics, Nanoscale Photonics, Nanoscale Physics, 나노 물리와 나노 광자학, 응집 물질 물리

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