Temperature tunable Anderson localization for graphene surface plasmons
Department of Physics, Shiraz University,
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Received in final form: 24 October 2018
Published online: 14 January 2019
In this paper, we propose a one-dimensional disordered plasmonic structure composed of a graphene single layer placed on a random grating composed of InAs. The propagation of a plasmonic wave through this structure is investigated numerically. By calculation of normalized localization length for systems with different disorder strengths, it is determined whether or not the system is in the localized regime. For some frequencies, depending on the disorder level, Anderson localization occurs for plasmonic waves propagating through the graphene layer. Furthermore, the effect of optical loss on the localization length is studied. By calculating the localization length at different temperatures, it is observed that Anderson localization of graphene plasmons is temperature dependent and can be controlled by changing the temperature. In the transmission spectrum for each random realization, there are some resonance peaks that are blueshifted with increasing the temperature. Finally, the effects of Fermi energy level of the graphene layer and width of air gaps on the individual transmission resonances are examined.
Key words: Solid State and Materials
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2019