An ADI-FDTD Formulation With Modified Lorentz Dispersion for the Study of Plasmonic Structures (original) (raw)

Photonics Technology Letters, IEEE, 2014

Abstract

ABSTRACT This letter presents an alternating-direction implicit finite-difference time-domain scheme for the efficient study of plasmonic systems. The material dispersion is described by generalized modified Lorentzian terms and it is implemented via the auxiliary differential equations technique employing an order reduction. The computational domain is backed by a properly designed convolution perfectly matched layer. The efficiency of the proposed method is validated in benchmark examples and its unconditional stability is evidenced by the Fourier method.

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