Giant faraday rotation in graphene metamolecules due to plasmonic coupling

Jian Qiang Liu; Shan Wu; Yu Xiu Zhou; Meng Dong He; Anatoly V. Zayats

doi:10.1109/JLT.2018.2818712

Giant faraday rotation in graphene metamolecules due to plasmonic coupling

Jian Qiang Liu^*, Shan Wu, Yu Xiu Zhou, Meng Dong He, Anatoly V. Zayats

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

We designed and numerically investigated a mechanism to enhance the polarization rotation when THz radiation passes through an array of multilayered graphene/insulator disks placed in a static magnetic field. The observed giant Faraday rotation is due to plasmonic coupling in the disks leading to the enhanced dipole oscillation strength of plasmonic antibonding states. With additional electromagnetic coupling between the disks in the array, the Faraday rotation angles nearly 30° are achieved in a relatively small external magnetic field of around 1 T. The operation wavelength can be tuned within the THz spectral range by controlling the Fermi level of graphene, number of graphene layers, and disk size and period. The proposed mechanism opens up a way to design the ultrathin magneto-optical nanophotonic devices and polarization rotators with high transmittance in the mid-infrared range.

Original language	English
Pages (from-to)	2606-2610
Number of pages	5
Journal	JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume	36
Issue number	13
DOIs	https://doi.org/10.1109/JLT.2018.2818712
Publication status	Published - 1 Jul 2018

Keywords

Metamaterials
nanophotonics
optical devices
optical polarization

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10.1109/JLT.2018.2818712

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title = "Giant faraday rotation in graphene metamolecules due to plasmonic coupling",

abstract = "We designed and numerically investigated a mechanism to enhance the polarization rotation when THz radiation passes through an array of multilayered graphene/insulator disks placed in a static magnetic field. The observed giant Faraday rotation is due to plasmonic coupling in the disks leading to the enhanced dipole oscillation strength of plasmonic antibonding states. With additional electromagnetic coupling between the disks in the array, the Faraday rotation angles nearly 30° are achieved in a relatively small external magnetic field of around 1 T. The operation wavelength can be tuned within the THz spectral range by controlling the Fermi level of graphene, number of graphene layers, and disk size and period. The proposed mechanism opens up a way to design the ultrathin magneto-optical nanophotonic devices and polarization rotators with high transmittance in the mid-infrared range.",

keywords = "Metamaterials, nanophotonics, optical devices, optical polarization",

author = "Liu, {Jian Qiang} and Shan Wu and Zhou, {Yu Xiu} and He, {Meng Dong} and Zayats, {Anatoly V.}",

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T1 - Giant faraday rotation in graphene metamolecules due to plasmonic coupling

AU - Liu, Jian Qiang

AU - Wu, Shan

AU - Zhou, Yu Xiu

AU - He, Meng Dong

AU - Zayats, Anatoly V.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - We designed and numerically investigated a mechanism to enhance the polarization rotation when THz radiation passes through an array of multilayered graphene/insulator disks placed in a static magnetic field. The observed giant Faraday rotation is due to plasmonic coupling in the disks leading to the enhanced dipole oscillation strength of plasmonic antibonding states. With additional electromagnetic coupling between the disks in the array, the Faraday rotation angles nearly 30° are achieved in a relatively small external magnetic field of around 1 T. The operation wavelength can be tuned within the THz spectral range by controlling the Fermi level of graphene, number of graphene layers, and disk size and period. The proposed mechanism opens up a way to design the ultrathin magneto-optical nanophotonic devices and polarization rotators with high transmittance in the mid-infrared range.

AB - We designed and numerically investigated a mechanism to enhance the polarization rotation when THz radiation passes through an array of multilayered graphene/insulator disks placed in a static magnetic field. The observed giant Faraday rotation is due to plasmonic coupling in the disks leading to the enhanced dipole oscillation strength of plasmonic antibonding states. With additional electromagnetic coupling between the disks in the array, the Faraday rotation angles nearly 30° are achieved in a relatively small external magnetic field of around 1 T. The operation wavelength can be tuned within the THz spectral range by controlling the Fermi level of graphene, number of graphene layers, and disk size and period. The proposed mechanism opens up a way to design the ultrathin magneto-optical nanophotonic devices and polarization rotators with high transmittance in the mid-infrared range.

KW - Metamaterials

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KW - optical polarization

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Giant faraday rotation in graphene metamolecules due to plasmonic coupling

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