摘要 |
The unit has a carrier substrate, and a fully or partially covered coating that is attached on the substrate, where the coating contains a nanoparticle of doped semiconductor material. Cadmium selenide, zinc selenide, cadmium sulfide, zinc sulfide, zinc oxide and lead selenide are applied as semiconductor material. Dimension of the nanoparticle amounts to 1-10 nanometers. The nanoparticle is attached on the embossed finish of an optical active unit, such as hologram, surface structure, diffraction grating and kinegram. |