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Enhanced Faraday rotation and magneto-optical figure of merit in gold grating/graphene/silicon hybrid magneto-plasmonic devices
- Source :
- APL Photonics, Vol 3, Iss 1, Pp 016103-016103-8 (2018)
- Publication Year :
- 2018
- Publisher :
- AIP Publishing LLC, 2018.
-
Abstract
- Graphene is a promising THz magneto-optical material. However, high Faraday rotation is only achievable at a low THz frequency range in single layer graphene. In this paper, we report simultaneous Faraday rotation and optical transmission enhancement in Au grating/graphene/silicon hybrid plasmonic structures across a wide frequency range from 0.43 to 24 THz using extraordinary transmission of THz spoof surface plasmons. In a broad frequency range up to 13.1 THz, the Faraday rotation and magneto-optical figure of merit in this hybrid structure can exceed the maximum value of single layer graphene at the low THz frequency range. Numerical analysis on the device dispersion relation indicates that the mechanism of simultaneous Faraday rotation and transmission enhancement is due to coupling of the TE waveguide mode with the TM hybrid waveguide-plasmon mode. Our work demonstrates the hybrid plasmonic structure as a promising candidate for THz nonreciprocal photonic device applications.
- Subjects :
- Applied optics. Photonics
TA1501-1820
Subjects
Details
- Language :
- English
- ISSN :
- 23780967
- Volume :
- 3
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- APL Photonics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.92e0d315f704466b3a880a3c2f08498
- Document Type :
- article
- Full Text :
- https://doi.org/10.1063/1.5008775