Controlled manipulation of light by cooperative response of atoms in an   optical lattice
  We show that a cooperative atom response in an optical lattice to resonant incident light can be employed for precise control and manipulation of light on a subwavelength scale. Specific collective excitation modes of the system that result from strong light-mediated dipole-dipole interactions can be addressed by tailoring the spatial phase-profile of the incident light. We demonstrate how the collective response can be used to produce optical excitations at well-isolated sites on the lattice. 
Stewart D. Jenkins and Janne Ruostekoski
physics.optics cond-mat.quant-gas quant-ph