  Optical metamaterials (OMs) at visible wavelengths have been extensively
developed. OMs reported recently are all composed of periodic structure, and
fabricated by top-down approaches. Here demonstrated are the colored visible
light frequency metamaterials composed of double layer array disordered and
geometrical variational dendritic cells as well as fabricated by a novel
bottom-up approach. The experiment demonstrates that the OMs composed of random
silver dendritic cells which caused the appearance of multiple transmission
passbands at red and yellow light frequencies. Moreover, the slab focusing
experiment reveals a clear point image in the range of half-wavelength with an
intensity of 5% higher than that of the light source. The colored OMs proposed
will create a new way to prepare the cloak and the perfect lens suitable for
optical frequency.
