Even for a 100 nm interparticle distance or a small change in particle shape, optical Fano-like plasmonic resonance mode usually vanishes completely. It would be remarkable if stable Fano-like resonance could somehow be achieved in distinctly shaped nanoparticles for more than 1 μ m interparticle distance, which corresponds to the far electromagnetic field region. If such far-field Fano-like plasmonic resonance can be achieved, controlling the reversal of the far-field binding force can be attained, like the currently reported reversals for near-field cases. In this work, we have proposed an optical set-up to achieve such a robust and stable Fano-like plasmonic resonance, and comparatively studied its remarkable impact on controlling the reversal of near- and far-field optical binding forces. In our proposed set-up, the distinctly shaped plasmonic tetramers are half immersed (i.e. air–benzene) in an inhomogeneous dielectric interface and illuminated by circular polarized l...

中文翻译：

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稳定的类Fano等离子体共振：其对远场和近场光学结合力反转的影响

即使对于100 nm的粒子间距离或粒子形状的微小变化，类似光学Fano的等离子体共振模式通常也会完全消失。如果能够以某种方式在形状明显不同的纳米粒子中实现大于1μm的粒子间距离（相当于远电磁场区域），则能够获得稳定的类似于Fano的共振，那将是非常了不起的。如果可以实现这种远场类Fano等离子体共振，则可以控制远场结合力的逆转，就像目前报道的近场情况逆转一样。在这项工作中，我们提出了一种实现这种鲁棒且稳定的类Fano等离子体共振的光学装置，并比较研究了其对控制近场和远场光学结合力反转的显着影响。在我们建议的设置中，