本篇論文以數值方法展示了電漿子奈米圓盤結構在近、遠場耦合時之反交會現象(Avoided resonance crossings , ARC)。在近場耦合時，不論是上下配置或是左右配置的雙圓盤都會因為結構對稱性的破壞而發生能量及線寬的分裂。而在遠場耦合時，雙層圓盤陣列的Fabry Perot共振波長對應到頻率選擇表面的帶通、帶斥中心時，發生了吸收頻譜的non-reciprocal現象。正、反向入射時同樣利用結構對稱性的破壞也導致能量的交會及線寬的分裂現象，這種正、反向入射時展現出吸收峰消失或增強的non-reciprocal現象可以很好的由Frequency-Selective-Surface-Fabry-Perot model來解釋。

Avoided-resonance-crossings(ARC) in plasmonic nanodisk structures due to near field or far field couplings were numerically demonstrated. Near field coupling in disk dimmer with both vertical or side-by-side arrangement leads to both energy and linewidth anti-crossing by varying one disk size across the other. Far field coupling in double layered disk arrays of gap size with Fabry-Perot(FP) resonant condition close to the frequency-selective-surface(FSS) stopband center leads to non-reciprocal absorption spectrum as one disk size varying across the other. We observe energy (linewidth) crossing(anti-crossing) of the absorption peak from different side illumination by varying either the size of one disk array or the gap in hetero disk arrays. The disappearing of FP resonant mode from one side illumination and the appearing of nonreciprocal nearly perfect absorption from the other side illumination are well explained by a Frequency-Selective-Surface-Fabry-Perot(FSS-FP) model.

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