Intrinsic terahertz plasmons and magnetoplasmons in large scale monolayer graphene |
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Authors: | Crassee I Orlita M Potemski M Walter A L Ostler M Seyller Th Gaponenko I Chen J Kuzmenko A B |
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Affiliation: | Département de Physique de la Matière Condensée, Université de Genève, 1211 Genève, Switzerland. Iris.Crassee@unige.ch |
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Abstract: | We show that in graphene epitaxially grown on SiC the Drude absorption is transformed into a strong terahertz plasmonic peak due to natural nanoscale inhomogeneities, such as substrate terraces and wrinkles. The excitation of the plasmon modifies dramatically the magneto-optical response and in particular the Faraday rotation. This makes graphene a unique playground for plasmon-controlled magneto-optical phenomena thanks to a cyclotron mass 2 orders of magnitude smaller than in conventional plasmonic materials such as noble metals. |
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