Optical fabrication of two-dimensional photorefractive periodic photonic lattices and quasicrystal microstructures by multi-lens board

Abstract

We experimentally demonstrate a convenient approach to fabricate two-dimensional periodic photonic lattices and quasicrystal microstructures in iron-doped lithium niobate photorefractive crystal by multi-lens board. The method does not require complicated optical adjustment system. We analyze the induced square photonic lattices, elliptic photonic lattices and quasicrystal microstructures by plane wave guiding, far-field diffraction pattern imaging and Brillouin-zone spectroscopy. Induced photonic microstructures can be fixed or erased and re-recorded in the crystal. We also numerically demonstrate that the method can be easily extended to form other complex photonic microstructures by designing the multi-lens board appropriately.