Giant Faraday rotation of high-order plasmonic modes in graphene-covered nanowires
arXiv:1606.00287 · doi:10.1021/acs.nanolett.6b01517
Abstract
Plasmonic Faraday rotation in nanowires manifests itself in the rotation of the spatial intensity distribution of high-order surface plasmon polariton (SPP) modes around the nanowire axis. Here we predict theoretically the giant Faraday rotation for SPP propagating on graphene-coated magneto-optically active nanowires. Upon the reversal of the external magnetic field pointing along the nanowire axis some high-order plasmonic modes may be rotated by up to ~ 100 degrees on scale of about 500 nm at mid-infrared frequencies. Tuning carrier concentration in graphene by chemical doping or gate voltage allows for controlling SPP-properties and notably the rotation angle of high-order azimuthal modes. Our results open the door to novel plasmonic applications ranging from nanowire-based Faraday isolators to the magnetic control in quantum-optical applications.
15 pages, 3 figures, submitted to Nano Letters
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- Magnetic-field-assisted transmission of THz waves through a graphene layer combined with a periodically perforated metallic film
- Topologically Induced Optical Activity in Graphene-Based Meta-Structures
- Magneto-optics of the 2D iron-garnet nanocylinder array with localized and lattice modes