纳米天线中光局域化的模式平衡远场控制
Mode-balancing far field control of light localization in nanoantennas
摘要：
光定位控制在一个等离子体纳米天线中的远场域的谐波制度中的λ/10的规模。所研究的纳米天线由3个直径为50 nm的对齐球体组成，间距为5 nm。通过简单地调整入射平面波的方向，对称和反对称模式平衡引起一个腔中的近场强度的强烈增强，同时使另一个腔中的光强度无效。此外，它表明，等离子体粒子的偶极矩可以完全熄灭时，强烈耦合的二聚体相同的纳米粒子。因此，可以在超紧凑的对称金属结构中实现光学透明性。
英文摘要：
Light localization is controlled at a scale of lambda/10 in the harmonic regime from the far field domain in a plasmonic nanoantenna. The nanoantenna under study consists of 3 aligned spheres 50 nm in diameter separated by a distance of 5 nm. By simply tuning the orientation of an incident plane wave, symmetric and antisymmetric mode-balancing induces a strong enhancement of the near field intensity in one cavity while nullifying the light intensity in the other cavity. Furthermore, it is demonstrated that the dipolar moment of a plasmonic particle can be fully extinguished when strongly coupled with a dimer of identical nanoparticles. Consequently, optical transparency can be achieved in an ultra-compact symmetric metallic structure.
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