Volume 122, Number 6, June 2018
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||02 August 2018|
Tunable Anderson localization of propagating graphene surface plasmon modes in a random modulated graphene monolayer
1 Physics Department, College of Science, Shiraz University - Shiraz, Iran
2 Nipissing Computational Physics Laboratory (NCPL), Department of Computer Science and Mathematics, Nipissing University - North Bay, ON P1B 8L7, Canada
Received: 9 May 2018
Accepted: 9 July 2018
Graphene is a two-dimensional material that has attracted a lot of attention due to the excitation of surface plasmons in the mid-infrared region. In this letter, we present the emergence of Anderson localization of propagating surface plasmon in a monolayer of graphene imbedded on a silicon random grating nanostructure. Several new localized graphene surface plasmon (GSP) modes with higher intensity and quality factor occur with respect to corresponding modes in the periodic substrate structure. Although tuning the resonance wavelengths belonging to Anderson localized GSPs is a difficult task due to its random nature, here we tune these wavelengths by adjusting the Fermi energy of the monolayer graphene.
PACS: 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 73.20.Fz – Weak or Anderson localization / 78.67.Wj – Optical properties of graphene
© EPLA, 2018
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