Title :
A Loss-Controllable Absorbing Boundary Condition for Surface Plasmon Polaritons Propagating Onto Graphene
Author :
Amanatiadis, Stamatios A. ; Kantartzis, Nikolaos V. ; Tsiboukis, Theodoros D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Thessaloniki, Greece
Abstract :
The development of a robust terminating boundary scheme for the transverse magnetic surface plasmon polaritons, supported on graphene, is introduced in this paper and incorporated in the finite-difference time-domain (FDTD) method. First, the 2-D FDTD algorithm is adjusted to efficiently model the graphene sheet as a surface conductivity, and the effect of the scattering rate-the main loss mechanism of graphene-on the surface wave propagation properties, is thoroughly studied. Then, the new scheme is optimally formulated via the prior scattering rate and combined with the FDTD algorithm. Its enhanced performance is successfully validated for several 2-D setups and a 3-D configuration with a surface wave traveling on a graphene microribbon waveguide.
Keywords :
finite difference time-domain analysis; graphene; polaritons; surface conductivity; surface plasmons; surface scattering; 2D FDTD algorithm; 3D configuration; C; finite-difference time-domain method; graphene microribbon waveguide; graphene sheet; loss-controllable absorbing boundary condition; robust terminating boundary scheme; scattering rate; surface conductivity; surface scattering rate; surface wave propagation properties; surface wave traveling; transverse magnetic surface plasmon polaritons; Conductivity; Finite difference methods; Graphene; Scattering; Surface impedance; Surface waves; Time-domain analysis; Finite-difference time-domain (FDTD) method; graphene; intraband conductivity; surface waves; terminating boundary schemes;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2363109
