  We investigate the cooperative behavior of regular monolayers of driven
two-level dipoles, using classical electrodynamics simulations. The dipolar
response results from the interference of many cooperative eigenmodes, each
frequency-shifted from the single resonant dipole case, and with a modified
lifetime, due to the interactions between dipoles. Of particular interest is
the kagome lattice, where the semiregular geometry permits simultaneous
excitation of two dominant modes, one strongly subradiant, leading to an
electromagnetically-induced-transparency-like interference in a two-level
system. The interfering modes are associated with ferroelectric and
antiferroelectric ordering in alternate lattice rows with long range
interactions.
