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We fabricate several different photonic lattice microstructures in iron-doped lithium niobate photorefractive crystal using single step projection method by a spatial light modulator. Wavy photonic lattice and several lattice structures with different defects were one-step induced inside the crystal. This method makes up the weakness of the conventional multiple beams interference method. The experimental setup is very flexible and easy to operate without complicated programming. Induced photonic structures can be fixed or erased and re-recorded in the crystal. The method can be easily extended to fabricate diverse photonic microstructures by drawing different structural patterns on a computer. [ABSTRACT FROM AUTHOR]

Abstract: We demonstrate an approach for easy fabrication of two- and three-dimensional optically induced nonlinear photonic lattices microstructures in photorefractive crystal by applying spatial filter and amplitude mask. The experimental setup of this method is very simple and flexible without complicated optical adjustment system. It can be applied in almost any optical laboratories. Two-dimensional hexagonal, square and three-dimensional hexagonal nonlinear photonic lattices microstructures have been produced in an iron-doped lithium niobate photorefractive crystal. The period of the induced photonic lattices microstructures can be dominated easily. This method is easily extended to generate more complex photonic lattices microstructures in photorefractive crystals, such as quasicrystal lattice. [Copyright &y& Elsevier]