Red omnidirectional structural color made from metal and dielectric layers

A paint pigment in the form of a multilayer stack, said paint pigment comprising:

• a reflector layer;
• a dielectric layer extending across said reflector layer, said reflector layer and said dielectric layer reflecting more than 70% of incident white light with wavelengths greater than 550 nm;
• and
• a selective absorbing layer extending across said dielectric layer, said selective absorber layer absorbing more than 70% of said incident white light with wavelengths less than 550 nm;
• said reflector layer, dielectric layer and selective absorbing layer forming an omnidirectional reflector, said omnidirectional reflector reflecting a narrow band of visible electromagnetic radiation with a center wavelength between 550-700 nm, a width of less than 100 nm wide and a color shift of less than 100 nm when said omnidirectional reflector is viewed from angles between 0 and 45 degrees.

A paint pigment in the form of a multilayer stack, said paint pigment comprising:

• a reflector layer;
• a dielectric layer extending across said reflector layer, said reflector layer and said dielectric layer reflecting more than 70% of incident white light with wavelengths greater than 550 nm;
• and
• a selective absorbing layer extending across said dielectric layer, said selective absorber layer absorbing more than 70% of said incident white light with wavelengths less than 550 nm;
• said reflector layer, dielectric layer and selective absorbing layer forming an omnidirectional reflector, said omnidirectional reflector reflecting a narrow band of visible electromagnetic radiation with a UV-sided edge and an IR spectrum edge, said narrow band of visible electromagnetic radiation having a width of less than 200 nm wide and a shift of said UV-sided edge of less than 100 nm when said omnidirectional reflector is viewed from angles between 0 and 45 degrees.