Security element with subwavelength grid

摘要

A security element for producing value documents, such as banknotes, checks or the like, will be described, comprising: a dielectric substrate (7, 8), a first lattice structure (2) embedded in the substrate (7, 8) ), which is periodic in a first spatial direction with a period not exceeding 450 nm and generates a polarization effect in transmission observation, in which substrate a second second lattice structure (4) lying in a second plane spaced from the first plane is embedded Transmission observation produces a second polarization effect different from the first polarization effect and is periodic in a second spatial direction with a period not exceeding 450 nm, wherein between the first and the second grating structure (2, 4) a transparent material in the visible spectral region (3) is arranged is formed such that it transmits through one of the two grating structures (2, 4) s polarized light modified so that it isotropic through the other of the two lattice structures (4, 2) occurs.