“…[1][2][3] The subject has recently received renewed attention 4,5 with the prediction 6,7 and experimental observation [8][9][10][11][12] of interesting optical phenomena that result from the interaction between the geometrical resonance associated with light diffraction and the excitation of localized surface-plasmon resonances in metallic nanoparticles, which play the role of plasmonic nanoantennas. 13 In addition to the interesting physics revealed in such systems, a number of applications have been proposed, including nanoscale energy transport, 14,15 sensing, 16,17 and modifying spontaneous emission, 18 which rely on the improved quality factor resulting from the reduction in radiative damping of the array as compared to localized plasmons excited in isolated particles. Recent advances in the control of the angular emission from quantum dots are also based on diffractive coupling of antenna elements.…”