Single beam atom sorting machine
  We create two overlapping one-dimensional optical lattices using a single laser beam, a spatial light modulator and a high numerical aperture lens. These lattices have the potential to trap single atoms, and using the dynamic capabilities of the spatial light modulator may shift and sort atoms to a minimum atom-atom separation of $1.52 \mu$m. We show how a simple feedback circuit can compensate for the spatial light modulator's intensity modulation. 
M. McGovern, T. Gr\"unzweig, A. J. Hilliard and M. F. Andersen
physics.optics