Perfect plane-wave source for a high-order symplectic finite-difference time-domain scheme  

作　　者：王辉 黄志祥 吴先良 任信钢 

机构地区：[1]Key Laboratory of Intelligent Computing & Signal Processing of Ministry of Education,Anhui University [2]Department of Physics and Electronic Engineering,Hefei Normal University

出　　处：《Chinese Physics B》2011年第11期365-370,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.60931002 and 61101064);the Universities Natural Science Foundation of Anhui Province,China(Grant Nos.KJ2011A002 and 1108085J01)

摘　　要：The method of splitting a plane-wave finite-difference time-domain （SP-FDTD） algorithm is presented for the initiation of plane-wave source in the total-field / scattered-field （TF/SF） formulation of high-order symplectic finite- difference time-domain （SFDTD） scheme for the first time. By splitting the fields on one-dimensional grid and using the nature of numerical plane-wave in finite-difference time-domain （FDTD）, the identical dispersion relation can be obtained and proved between the one-dimensional and three-dimensional grids. An efficient plane-wave source is simulated on one-dimensional grid and a perfect match can be achieved for a plane-wave propagating at any angle forming an integer grid cell ratio. Numerical simulations show that the method is valid for SFDTD and the residual field in SF region is shrinked down to -300 dB.The method of splitting a plane-wave finite-difference time-domain （SP-FDTD） algorithm is presented for the initiation of plane-wave source in the total-field / scattered-field （TF/SF） formulation of high-order symplectic finite- difference time-domain （SFDTD） scheme for the first time. By splitting the fields on one-dimensional grid and using the nature of numerical plane-wave in finite-difference time-domain （FDTD）, the identical dispersion relation can be obtained and proved between the one-dimensional and three-dimensional grids. An efficient plane-wave source is simulated on one-dimensional grid and a perfect match can be achieved for a plane-wave propagating at any angle forming an integer grid cell ratio. Numerical simulations show that the method is valid for SFDTD and the residual field in SF region is shrinked down to -300 dB.

关 键 词：splitting plane-wave finite-difference time-domain high-order symplectic finite-differencetime-domain scheme plane-wave source 

分 类 号：O411[理学—理论物理]