2022/06/13 by da Silva, B. Pinheiro, Santos, G. H. dos, de Oliveira, A. G. +8
#FOS: Physical sciences #Optics (physics.optics)
paper · doi:10.48550/arxiv.2206.06153
A triangular-lattice pattern is observed in light beams resulting from the spatial cross modulation between an optical vortex and a triangular shaped beam undergoing parametric interaction. Both up- and down-conversion processes are investigated, and the far-field image of the converted beam exhibits a triangular lattice. The number of sites and the lattice orientation are determined by the topological charge of the vortex beam. In the down-conversion process, the lattice orientation can also be affected by phase conjugation. The observed cross modulation works for a large variety of spatial field structures, and could replace solid-state devices at wavelengths where they are not yet available.