Role of multipole interaction to the appearance of the red-shifted Mi-Frohlich resonance induced by an interacting pairs of copper nanoparticles encapsulated by an amorphous carbon matrix
Istomin I.E.1, Yastrebov S.G.1, Vasilevskaya T.N.1
1Ioffe Institute, St. Petersburg, Russia
Email: kesha22ist@gmail.com, yastrebov@mail.ioffe.ru
A model that takes into account the contribution to optical absorption of the interaction between neighboring copper nanoclusters forming dimers is proposed. It allows to explain the splitting of the Mi-Frelich resonance experimentally observed in layers of amorphous hydrogenated carbon modified with copper. The model also predicts quite accurately the absolute values of the resonance frequencies observed experimentally. Keywords: plasmonics, metal nanoparticles, dimers.
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