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An improved locally one-dimensional finite-difference time-domain (LOD-FDTD) method is proposed for modelling graphene-based structures. The graphene sheet is considered as a polarization current source characterized by an auxiliary difference equation (ADE). Both intraband and interband surface conductivities of the graphene are modelled with the help of vector fitting technique. Such hybrid ADE-LOD-FDTD...
A nanometric and high sensitive refractive index sensor is proposed in a graphene-based nanoribbon waveguide coupled with graphene rectangular resonators structure based on the 3D finite-difference time-domain (FDTD) method. The results indicate that there exists one transmission window in the transmission spectrum, which is induced from the coupling effect between the electric dipole mode and quadrupole...
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