Second-order optical nonlinear material

摘要

Second-order optical nonlinear material arranged on a substrate (10; 21, 22, 23; 50, 51), wherein the second-order optical nonlinear material (14; 24; 45; 52) comprises at least two different materials (A; B; C) arranged in layers on the substrate (10; 21, 22, 23; 50, 51). The layers are arranged on each other in a predetermined order based on the type of material and/or orientation of the layer. The predetermined order is chosen so that the layers of the at least two different materials possess no macroscopic centrosymmetry with respect to their material and/or orientation.