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Title PT plasmons in rectangular and twist geometries
Author Συγριμής, Ανδριανός-Ηλίας
Thesis advisor Τσιρώνης, Γεώργιος
Abstract The purpose of this thesis is to examine parity-time surface plasmon polaritons(SPP) known as PT plasmons, in short, in rectangular geometries. We start by defining what is a PT symmetry. Then we continue by analyzing the theoretical background of the electromagnetic(EM) waves and the dielectric function in both classical,using the Drude model, and quantum approach, using the random phase approximation(RPA). Furthermore, we examine the dispersion of volume(bulk) plasmons and we move directly to the surface plasmons at single- and multi- layer interfaces, where we find a gain that counterbalance the losses of the physical system and has similar properties as of the PT symmetry. Finally we perform some simulations using the COMSOL Multiphysics software for those interfaces and for graphene and we present our conclusions.
Language English
Issue date 2023-11-22
Collection   School/Department--School of Sciences and Engineering--Department of Physics--Graduate theses
  Type of Work--Graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/1/0/b/metadata-dlib-1696575517-526365-13931.tkl Bookmark and Share
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