Design of Optimum Nanoantenna Arrays for Detection Applications

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Armand, Mohammad Javad | 2020

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Type of Document: Ph.D. Dissertation
Language: Farsi
Document No: 53249 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Rashidian, Bijan; Shahmansouri, Afsaneh
Abstract:
The main goal of this thesis is introducing a method to design optimum nanoantenna arrays for detection applications. The proposed method is based on the multiple-scattering T-matrix in connection with the Ewald method. The formulation is systematic, quite general, easily traceable, and fast. Its high speed of analysis makes it well suited to design optimizations.In particular, we calculate multiple-scattering terms of the T-matrix formulation with the Ewald method. To the best of our knowledge no report on derivation of the T-matrix of a 3D (or even 2D) periodic array from the T-matrix of the isolated element, based on Ewald method has been reported before.Finally, a software has been developed in MATLAB based on the Ewald T-matrix method. The software solves scattering of plane waves by nanoantennas array. For validating the proposed method, several examples of scattering problems are solved, and the resulting scattering spectrum, and the total field are compared with those obtained using the method of moments.Among other advantageous, the proposed method is capable of determining dark modes of arrays
Keywords:
Localized Surface Plasmons ; T-Matrix Method ; Nanoantenna ; Plasmon Modes ; Electromagnetic Wave Scattering ; Nanoantennas Array ; Ewald Method