  Colors observed in nature are very important to form our perception of an
object as well as its design. The desire to reproduce vivid colors such as
those found in birds, fishes, flowers and insects has driven extensive research
into nanostructured surfaces. Structural colors based on surface plasmon
resonance (SPR) have played an important role in this field due to its high
spatial resolution. Creating vivid color reflecting surfaces is still a major
challenge and could revolutionize low power consumption image displays. Here we
combine diffraction and plasmonic effects to design bright and vivid-color
reflecting surfaces. The periodic reflection patterns are designed through
genetic algorithm optimization and are defined in aluminum coated silicon
chips.
