Title :
An ADI-FDTD Formulation With Modified Lorentz Dispersion for the Study of Plasmonic Structures
Author :
Prokopidis, Konstantinos P. ; Zografopoulos, Dimitrios C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Thessaloniki, Greece
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.
Keywords :
differential equations; finite difference time-domain analysis; optical design techniques; optical dispersion; plasmonics; ADI-FDTD formulation; Fourier method; alternating-direction implicit finite-difference time-domain scheme; auxiliary differential equations technique; computational domain; convolution perfectly matched layer design; material dispersion; modified Lorentz dispersion; plasmonic structures; Dispersion; Finite difference methods; Mathematical model; Media; Plasmons; Stability analysis; Time-domain analysis; Alternating-direction implicit finite-difference time-domain method; auxiliary differential equations; dispersive media; plasmonic circuitry;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2354532
