| 摘要 |
The invention relates to a safety and/or valuable document having a safety element, wherein the safety element has a photonic crystal arranged on a substrate in relation to an orientation defined on a surface of the substrate, and a luminescent substance. It is characterized in that an emission wavelength lambda of the luminescent substance, and a grid constant of the photonic crystal are aligned with each other and specified according to the formula lambda = m * 2 * d, wherein d is a distance between two lattice planes of the photonic crystal, and m is a positive integer. |
