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Título: | Interference, coupling, and nonlinear control of high-order modes in single asymmetric nanoantennas |
Autor: | Abb, Martina; Albella, Pablo CSIC ORCID; Aizpurua, Javier CSIC ORCID ; Muskens, Otto L. | Palabras clave: | Asymmetric dimer Nanoantenna Fano resonance Nonlinear responses Figure of merit Plasmon |
Fecha de publicación: | 2012 | Editor: | American Chemical Society | Citación: | ACS Nano 6(7): 6462-6470 (2012) | Resumen: | We investigate theoretically and experimentally the structure of plasmonic modes in individual asymmetric dimer antennas. Plasmonic near-field coupling of high-order modes results in hybridization of bright and dark modes of the individual nanorods, leading to an anticrossing of the coupled resonances. For two bright modes, hybridization results in a capacitive red shift and super-radiant broadening. We show that the properties of asymmetric dimers can be used for nonlinear control of spectral modes and demonstrate such a nonlinear effect by measuring the modulation of a hybrid asymmetric dimer-ITO antenna. With use of full electrodynamical calculations, we find that the properties of the near-field nonlinear responses are distinctly different from the far-field, which opens up new routes for nonlinear control of plasmonic nanosystems. © 2012 American Chemical Society. | URI: | http://hdl.handle.net/10261/101667 | DOI: | 10.1021/nn3021579 | Identificadores: | doi: 10.1021/nn3021579 issn: 1936-0851 e-issn: 1936-086X |
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