Patent ID: 6906861

Claim:
A light-diffractive binary grating structure with a microscopic mesa structure comprising periodically repeated plateaus separated by substantially rectangular valleys, wherein the arrangement of the valleys within a period of the mesa structure is an additive superimposition of at least three phase-shifted rectangular structures of a period equal to the period of the mesa structure, wherein the rectangular structures have a phase shift relative to each other in such a way that the plateaus of one rectangular structure fall into the valleys of the other rectangular structures and the mesa structure has an optically effective profile height of a value from the range of 25 nm to 5,000 nm, wherein an interface of the mesa structure is of a metallically reflective nature of visible incident light of a wavelength, and the period of the mesa structure is of a value in the range of 250 nm to 5,000 nm and at least one valley between two plateaus is of a width greater than a seventh of the period.