Holographic method for site-resolved detection of a 2D array of   ultracold atoms
  We propose a novel approach to site-resolved detection of a 2D gas of ultracold atoms in an optical lattice. A near resonant laser beam is coherently scattered by the atomic array and its interference pattern is holographically recorded by superimposing it with a reference laser beam on a CCD chip. Fourier transformation of the recorded intensity pattern reconstructs the atomic distribution in the lattice with single-site resolution. The holographic detection method requires only a few hundred scattered photons per atom in order to achieve a high reconstruction fidelity. Therefore, additional cooling during detection might not be necessary even for light atomic elements such as lithium. 
Daniel Kai Hoffmann, Benjamin Deissler, Wolfgang Limmer, and Johannes   Hecker Denschlag
cond-mat.quant-gas physics.atom-ph physics.optics