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Physical Review B
Full electrodynamic analysis of self-similar cascades of plasmonic nanospheres ͑nanolenses͒ that exhibit nanofocusing is performed. Electrodynamic resonances are identified and a significant local field enhancement ͑by a factor of hundreds͒ is found for different sizes and fractal ratios of the cascade system, and for different polarizations and directions of incidence of the excitation radiation. Supporting the earlier findings, the nanofocus ͑"hottest spot"͒ is found to be located in the gapdoi:10.1103/physrevb.77.115419 fatcat:rwwlxnr7dzd2nocyfroldyoh6i