SECURITY ELEMENT WITH TWO-DIMENSIONAL NANOSTRUCTURE, AND PRODUCTION METHOD FOR SAID SECURITY ELEMENT

The invention relates to a security element for a value document, wherein the security element (S) has: a dielectric substrate (2), in which a two-dimensionally periodic nanostructure (1) is formed, which has a multiplicity of base surface elements (9), which define a base plane (5), and surface elements (3) which are raised or lowered by contrast, wherein a distance measured perpendicularly to the base plane (5) exists between the base surface elements (9) and the surface elements (3), and connection flanks are formed between the base surface elements (9) and the surface elements (3), wherein the base surface elements (9) and the surface elements (3) are each covered by a metallic or highly refractive layer, which is thinner than the distance, and the base surface elements (9) and the surface elements (3) are arranged alternately in the nanostructure (1) in a regular pattern and in two directions running parallel to the base plane (5), with the associated period (d) of the arrangement of the surface elements (3) being between 100 nm and 450 nm, wherein the connection flanks are also covered by the layer, such that this covers the nanostructure (1) continuously.