Developing Parallel 3D FDTD Numerical Models for Studying Fishnet Structure Metamaterials and Metal Nano-Particles
Date Issued
2012
Date
2012
Author(s)
Lu, Chun-Ti
Abstract
In this thesis, a parallelized three-dimensional (3D) finite-difference time-domain (FDTD) method numerical simulator is developed by using the message passing interface (MPI) library coded in C++ language. The capabilities of the simulator are than demonstrated by studying two topics in metamaterials and plasmonics, respectively. The transmission/reflection spectra of metamaterial magnetic resonators with different parameters are calculated and a right-angled triangular prism is numerically designed to observe the negative-refractive-index properties of fishnet structure. For plasmonics, the spectra of total cross sections and the near fields of silver nano particles of different shapes including cubes, sphere-pairs, and nano plates, are investigated. It is shown that the phasor amplitude is larger when the wavelength is at the absorption-cross-section peak rather than the scattering-cross-section peak for the case of cubes. The FDTD obtained results are compared with those based on the pseudospectral time-domain (PSTD) method calculation. For the nano-plates, plate length along the incident electric polarization direction is found to be strongly correlated with the resonant wavelength for waves normally incident on the parallel plates.
Subjects
parallel
metamaterials
fishnet structure
metal nano-particles
finite-difference time-domain
periodic structure
Type
thesis
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