Micrometric spatial control of rare earth ion emission in LiNbO_3:A two-dimensional multicolor array

摘要

We report on the preparation and optical characterization of a two-dimensional multicolor emission arrangement obtained by embedding high refractive-index Er~(3+) doped CaTiO_3 nanoparticles into a Nd~(3+) doped LiNbO_3 crystal substrate prepatterned with an array of micro voids. By controlling the spatial location of the rare earth ions at the micrometer scale, we show the possibility of simultaneous spatial and spectral control of the spontaneous emission in a two-dimensional rare earth optically activated array. The results can be useful for the development of microcomposite rare earth based photonic devices, such as multicolor emission displays or pixelated color structures.