a b s t r a c t We have combined different rare earth ions (Er 3 + , Nd 3 + and Yb 3 +) in two dimensional ferroelectric patterns to obtain periodical fluorescent arrays. High refractive-index Er 3 + doped CaTiO 3 nanocrystals have been embedded into Nd 3 + or Yb 3 + doped LiNbO 3 substrates pre-patterned with a two dimensional arrays of micro-voids. The process of incorporation and consolidation of the optically active nanoparticles into the alternate domain structures leads to luminescent ring-shaped arrangements with innovative geometries and to a micrometer spatial control of the trivalent rare earth ion emitters. Multicolor emission systems and the possibility of chromatic switching at the micrometer scale among the different compounds forming the two dimensional structure is demonstrated.