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Success Stories | 草榴社区
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FDTD(Finite-Difference Time-Domain) ??? ?? ??? ? ??? ??? ?? ?? ???? ??? ?????. FDTD? ??? ?? ?? ??? ??? (Maxwell’s equations)? ?? ??, ????? ??? ?? ??? ?? ??? ??? ??? ???? ?????.

FDTD? ??? ???? ??? ??? ??????

FDTD ??? mesh? ?? ??? ???? ?? Δx, Δy ? Δz ???? ??? grid point?? E? H? ???? E? H? 3D ???? ?? ?????. FDTD? ??, ??, ??, ?? ?? ??? ?????. FDTD? ?? ?? ?????? ?? ??? ?? (Fast Fourier Transform, FFT) ? ?? ??? ?? (Discrete Fourier Transform, DFT)? ???? ??? ??? ?????.

FDTD Yee Cell of dimension Ax, Ay, Az. | 草榴社区

FDTD Yee Cell of dimension Ax, Ay, Az. [3]

?? ??? ???? ?? FDTD? ????????

FDTD? ??? ???? ???? ???? ?? ??? ????? ? ? ????. ? ??? ???? ?????? LED, ?? ??, ??, ? ???, ??? ?? ? ??, ??, ?? ? ???? ?????, ??? ??, ?? ??(?? ???)? ?????. ?? ????? ?? ??? ??? FullWAVE FDTD? ??????.

FDTD Simulation of Y-branch PBG splitter | 草榴社区

FDTD Simulation of Y-branch PBG splitter

草榴社区 ??? ???? ??? ??????

FullWAVE FDTD ?????草榴社区 ??? ???

FDTD ???? ?? ?????? ??????

草榴社区? FDTD ??? ???? ?? ??? ??? ??? ?????.

RSoft Photonic Device Tools ? ??? 草榴社区? FullWAVE FDTD ????? ?????? FDTD? ???? ??? ??? full-vector ?????? ?????. ?? ??? ??? ???? ?? ? ???? ???? ????? ? ?? ??? ??? FullWAVE FDTD? ? ?? ????? ?? ??? ?? ??? ?? ?????. ???? ?? (integrated) ? ?? ? ??? ??, FullWAVE FDTD? LED ??? ?? ??, ?? ?? ?? (DOE) ??, PIC/Custom PDK element ??, ?????? ? ?? ?? ??? ?? ????? ???? ????.

FullWAVE FDTD ?? : ?? ???? ?? Spatial Multiplexer ??

? ??? ? ??? ?? ??? ? ?? ??? ? ??? ???? ?? ??? ?? ?? ?? ? ?????. ?? ???? ?? ???? ?? ??? ????? ? ?? ?? ?? ??? ??? ? ?? ??? ?????. ? ???? ?? ??? ???? ?? ????? ?? ? ?? ??? ?? ??? ? ????.

?? ? ??? ???? ???? ???? ? ??? ? ?? ???? ??? ?? ???? ????? ??(excitation)??? ????. ? ??? ???????? ?? ? ??? ?? ??? ?? ???? ??? ?? ??? ?? ??? ???? ???? ??? full-vector ??? ??? ?????. FullWAVE FDTD? ??? ??? ????? ???? ?????. FullWAVE? ??? ???? ?? full-vector ???? ???? ????? ??? ?? ??, ??? ?? ??, ???? ?? ? ??? ?? ??? ???? ??? ???? ??? ??? ?? ????? ?? ?? ??? ???? ??? ? ????. ??? ?? ????? FullWAVE FDTD?? ??? ? ???? ?? ??? ?? ?? ??? ??? ? ????.

?? 1?? ??? ?? ???? ?? spatial multiplexer? ?? ??? metal-strip ??? ? ??? ?? ???? ???? ?????. ?? 3?? metal-strip ??? ??? ???? ??? ??? ???? ?? ??? ??? ??? ? ??? ?? ???? 3D FullWAVE FDTD ?????? ??? ???????. 

Figure 1: Schematic of the surface plasmon spatial multiplexer | 草榴社区

?? 1: surface-plasmon spatial multiplexer? ???

Figure 2: Simulation results showing the amplitude of the Ey field on the surface of the metal film: a) Normal incidence light (shown above) is coupled into the central metalstrip waveguide b) Angled incident light is coupled into one of the side metal strip waveguides | 草榴社区

?? 2: ?? ?? ??? Ey ?? ??? ???? ????? ??

a) ?? ???? ?? metal-strip ???? ?????.

b) ??? ?? ???? ?? metal-strip ??? ? ??? ?????.

Chip interconnect?? ?? ???? ??? ???? ?? ?? ? ??? ?? ? ????. ? ??? ? ? ??? FullWAVE FDTD? ?? ??? ????? ?????? ?? ???? ?? ??? ???? ?? ??? ?????? ? ??? ??? ?????.

? ?? ??? ?? ???? ??? ???? ??? ???????.

?? ??:

  1. J.P. Berenger, “A Perfectly Matched Layer for the Absorption of Electromagnetic waves” J. Comput. Phys., 114, 185 (1994) 
  2. A. Taflove, Computational Electrodynamics: The Finite-Difference Time-Domain Method, (Artech House, Norwood, MA, 1995) 
  3. K.S. Yee, “Numerical solution of initial boundary value problems involving Maxwell’s equations in isotropic media” IEEE Trans. Antennas Propagat., AP-14, 302 (1966)
  4. A. Imre et al. "Multiplexing surface plasmon polaritons on nanowires" Applied Physics Letters 91 083115 (2007).