10 September 2010 Straightforward control of light in a metallic trimer
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A trimer of gold particles 50 nm in diameter is illuminated in oblique incidence by a plane wave. It is shown that one can fully focus light in only one nanogap and that the localization of the hot spot between the two nanogaps is controlled via the angle of incidence of the illuminating plane wave. The physical mechanism of this surprising phenomenon is unveiled. It relies on the excitation of opposite and in phase modes. Furthermore, balancing of the fundamental modes of the system permits to extinguish the dipolar moment of a metallic particle.
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Nicolas Bonod, Nicolas Bonod, Alexis Devilez, Alexis Devilez, Brian Stout, Brian Stout, } "Straightforward control of light in a metallic trimer", Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 77570E (10 September 2010); doi: 10.1117/12.860549; https://doi.org/10.1117/12.860549

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