Design of Plasmonic Devices Using Time-Division Parallel Algorithm

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Novel parallel algorithm is introduced for electromagnetic transient analysis in order to design plasmonic devices. We have established time-division parallel computation for the finite-difference time-domain (FDTD) method. This completely parallel technique is extremely useful, since the computational task can be equally distributed to many processors and there is no data communication during a computation. The key idea of this parallel algorithm is as follows: (i) The coarse values at temporal sampling points can be independently obtained using a finite-difference complex-frequency-domain with a fast inverse Laplace transform. (ii) These values are transferred to the initial responses of the FDTD frames in many computational processors. (iii) Conventional FDTD computation is simply performed in completely parallel. The computational time for sequential part can be reduced to a fraction of the number of processors. We will apply the proposed technique to designing a plasmonic antenna for all optical magnetic recording purpose.

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