Lattice Resonances Induced by Periodic Vacancies in Arrays of Nanoparticles

Periodic arrays of nanoparticles are capable supporting lattice resonances, collective modes arising from the coherent interaction particles in array. These whose spectral position is determined by array periodicity, spectrally narrow and lead to strong optical responses, making them useful for a wide range applications, nanoscale light sources ultrasensitive biosensors. Here, we report that, removing an periodic fashion, it possible induce resonances at wavelengths commensurate with periodicity these vacancies, which would otherwise not be present system. Using coupled dipole approach, perform comprehensive analysis how properties vacancy-induced depend on particle size, number vacancies per unit area. Furthermore, find that have subradiant character originate symmetry breaking introduced cell presence vacancies. Finally, investigate potential implementation made nanocylinders embedded homogeneous dielectric environment. The results this work serve advance our understanding provide alternative method controlling response nanostructures.