Modeling and simulation of active plasmonics with the FDTD method by using solid state and Lorentz–Drude dispersive model

Abstract

An approach for the simulation of active plasmonics devices is presented in this paper. In the proposed approach, a multilevel multielectron quantum model is applied to the solid state part of a structure, where the electron dynamics are governed by the Pauli exclusion principle, state filling, and dynamical Fermi–Dirac thermalization, while for the metallic part, the Lorentz–Drude dispersive model is incorporated into Maxwell’s equations. The finite difference time domain method is applied to the resulting equations. For numerical results, the developed methodology is applied to a metal–semiconductor–metal plasmonic waveguide and a microcavity resonator.