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The collective effects in a periodic array of plasmonic doubleantenna meta-molecules are studied. We experimentally observe that the collective behavior in this structure substantially differs from the one observed in their single-antenna counterparts. This behavior is explained using an analytical dipole model. We find that in the double-antenna case the effective dipole-dipole interaction is significantly modified and the transverse long-range interaction is suppressed, giving rise to thedoi:10.1364/oe.19.022142 pmid:22109057 fatcat:hnwucnmicfgihan44mwayryowy