Atom-Chip Integrable Optical Lattice*

A lattice beam configuration which results in an isotropic 3D trap near the surface of an atom chip is described. The lattice is formed near the surface of a reflectively coated atom chip, where three incident beams and three reflected beams intersect. The coherent interference of these six beams form a lattice which extends to the surface of the atom chip. The lattice is experimentally realized and the trap frequency is measured. Though lacking phase stability, degenerate Raman sideband cooling was performed in the optical lattice, cooling 80 million atoms to 1.1 µK.