Graphene plasmonics for subwavelength terahertz oscillators forex


Micro- and Nanophotonic Materials Group, Faculty of Science, University of Mons, Bat. IV, Avenue Maistriau 69, B-7555 Mons, Belgium

Acomparison of graphene, superconductors and metals as

Two rich and vibrant fields of investigation x57569 graphene physics and plasmonics x57569 strongly overlap. Not only does graphene possess intrinsic plasmons that are tunable and adjustable, but a combination of graphene with noble-metal nanostructures promises a variety of exciting applications for conventional plasmonics. The versatility of graphene means that graphene-based plasmonics may enable the manufacture of novel optical devices working in different frequency ranges x57569 from terahertz to the visible x57569 with extremely high speed, low driving voltage, low power consumption and compact sizes. Here we review the field emerging at the intersection of graphene physics and plasmonics.

Graphene Plasmonic Metasurfaces to Steer Infrared Light

a , The schematics of plasmon excitation. b , Plasmon resonance in gated graphene microribbon arrays. Top: top and side views of a typical graphene microribbon array. D, drain G, gate S, source Bottom: gate-induced change of relative transmission spectra, as a function of excitation frequency for three different gate voltages. c , Control of plasmon resonance through microribbon width. Transmission spectra for the samples of different widths and the same doping concentration. d , Transparent graphene plasmonic devices. Extinction in stacked plasmonic devices with one, two and five graphene layers. Figures reproduced with permission from ref. 56 ( b and c ) and ref. 58 ( d ).



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