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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 1137-1140 |
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Gholipour A, Nasrollahi Moghaddam F, Mehrshahi E. Calculating Dyadic Green’s Function of SIGO Formulation Using Rapid Summation Methods for Analyzing Rectangular Plasmonic Nano-Resonators. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :1137-1140
URL: http://opsi.ir/article-1-2207-en.html
URL: http://opsi.ir/article-1-2207-en.html
1- Shahid Beheshti University, School of Electrical Engineering, Tehran, Iran.
Abstract: (1579 Views)
To analyze the nano-dipole antennas using Surface Impedance Generating Operator (SIGO), we need to compute the dyadic Green’s functions that are represented in triple summations. For successful implementation of SIGO using the MoM, fast computation of these series is necessary. Unfortunately, these series converge slowly, especially when the observation points come close to the source points. Ewald sum technique is used to improve the convergence rate of these series. On this paper, we optimize the Ewald method for the problem of plasmonic nano-dipole. This problem differs from those that normally are solved by Ewald sum technique in two main aspects. First, because SIGO is a kind of surface integral equation (SIE) method, both source and observation points are located on the boundary rather than inside the cavity. Second, the materials of nano-dipole arms, which are metals at optical frequencies, are lossy with negative index. These conditions entail that special measures are taken to apply rapid summation techniques effectively. It is shown that by controlling the parameters of rapid summation techniques, good convergence rate is achieved.
Keywords: Surface Impedance Generating Operator (SIGO), Method of Moment (MoM), Plasmonics, Nano-Antenna, Dyadic Green Function.
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