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Intrinsic Terahertz Plasmons and Magnetoplasmons in Large Scale Monolayer Graphene

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arxiv 1204.4372 v2 pith:O4FBTKIM submitted 2012-04-19 cond-mat.str-el cond-mat.mes-hallcond-mat.mtrl-sci

Intrinsic Terahertz Plasmons and Magnetoplasmons in Large Scale Monolayer Graphene

classification cond-mat.str-el cond-mat.mes-hallcond-mat.mtrl-sci
keywords graphenemagneto-opticalplasmonicterahertzabsorptionconventionalcyclotrondramatically
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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