Abstract
We numerically demonstrate dynamically tuneable plasmoninduced transparency in a π-shaped metamolecules made of graphene nanostrips by applying external static magnetic field. It is shown that for graphene nanostrips with appropriate Fermi energy, the resonant wavelength, line-shape, and the polarization of transmitted light in the mid-infrared can be effectively controlled by magnetic field. In particular, giant polarization rotation exceeding 20 ° has been observed in asymmetric graphene metamolecules, which is further enhanced to almost 40 ° due the Faraday effect in the applied magnetic field, at around 9 μm wavelength, much higher frequency than the Faraday rotation observed in a semi-infinite graphene microribbons. The results offer a flexible approach for the development of compact, tunable graphene-based photonic devices.
Original language | English |
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Pages (from-to) | 12524-12532 |
Number of pages | 9 |
Journal | OPTICS EXPRESS |
Volume | 23 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2015 |