Title :
Frequency-Dependent 3-D LOD-FDTD Method for the Analysis of Plasmonic Devices
Author :
Shibayama, Jun ; Ando, Ryoji ; Yamauchi, Junji ; Nakano, Hisamatsu
Author_Institution :
Fac. of Sci. & Eng., Hosei Univ., Tokyo, Japan
Abstract :
A simple trapezoidal recursive convolution technique is utilized to develop a frequency-dependent locally one-dimensional finite-difference time-domain (FDTD) method for the three-dimensional analysis of dispersive media. A gap plasmonic waveguide is analyzed and the numerical results are compared with those of the traditional explicit FDTD. A time step ten times as large as that determined from the stability criterion can be allowed to reduce computational time by 40%, offering acceptable numerical results. A plasmonic grating is analyzed as an application.
Keywords :
convolution; diffraction gratings; dispersive media; finite difference time-domain analysis; optical waveguides; plasmonics; polaritons; silver; surface plasmons; Ag; dispersive media; frequency dependent 3-D LOD-FDTD method; locally one dimensional finite difference time domain method; plasmonic devices; plasmonic grating; plasmonic waveguide; stability criterion; three dimensional analysis; trapezoidal recursive convolution; Dispersion; Finite difference methods; Numerical stability; Optical waveguides; Plasmons; Stability analysis; Time domain analysis; Alternating-direction implicit (ADI) scheme; locally one-dimensional (LOD) scheme; surface plasmon polariton (SPP); trapezoidal recursive convolution (TRC);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2154361
