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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2011-07-12
Acceleration Technique of FDTD Model with High Accuracy for Nanostructure Photonics
By
Yu Liu,

    Dr. Yu Liu

    Department of Optics and Optical engineering

    University of Science and Technology of China (USTC)

    China

    Homepage

Chun Chong Chen,

    Dr. Chun Chong Chen

    University of Science and Technology of China

    China

    Homepage

Pei Wang,

    Dr. Pei Wang

    University of Science and Technology of China

    China

    Homepage

Hai Ming

    Dr. Hai Ming

    Department of Physics

    University of Science and Technology of China

    China

    Homepage

Progress In Electromagnetics Research M, Vol. 19, 105-120, 2011
doi:10.2528/PIERM11060607 | Google Scholar

Abstract
To accurately model nanophotonic structures, a conformal dispersive finite difference time domain (FDTD) method based on an effective permittivity technique is presented, which can describe exactly the behaviors of evanescent waves in the vicinity of curved interface. A mismatch between the numerical permittivity and the analytical value introduced by the discretization in FDTD is demonstrated, thus, very fine time-step size is always necessary for nanostructures modelling, which greatly increases the required overheads of CPU time as compared to usual FDTD simulations. To resolve this problem, the performance of parallel FDTD code is investigated on a Gigabit Ethernet, and the acceleration technique for parallel FDTD algorithm is presented, which is developed by means of the replicating computation based on overlapping grids, the OpenMP multithreading technique and the vectorization based on SSE instruction. The comparison of relevant numerical results shows that these methods are able to reduce the expense of the system communications and enhance the utilization ratio of the CPU effectively, which improves greatly the performance of parallel FDTD with high time-consuming.
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Citation
Yu Liu, Chun Chong Chen, Pei Wang, and Hai Ming, "Acceleration Technique of FDTD Model with High Accuracy for Nanostructure Photonics," Progress In Electromagnetics Research M, Vol. 19, 105-120, 2011.
doi:10.2528/PIERM11060607
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