Experimental demonstration of single-site addressability in a two-dimensional optical lattice.

@article{Wrtz2009ExperimentalDO,
  title={Experimental demonstration of single-site addressability in a two-dimensional optical lattice.},
  author={Peter W{\"u}rtz and Tim Langen and Tatjana Gericke and Andreas Koglbauer and Herwig Ott},
  journal={Physical review letters},
  year={2009},
  volume={103 8},
  pages={
          080404
        }
}
We demonstrate single-site addressability in a two-dimensional optical lattice with 600 nm lattice spacing. After loading a Bose-Einstein condensate in the lattice potential, we use a focused electron beam to remove atoms from selected sites. The patterned structure is subsequently imaged by means of scanning electron microscopy. This technique allows one to create arbitrary patterns of mesoscopic atomic ensembles. We find that the patterns are remarkably stable against tunneling diffusion… 
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