. . . . "Preferred scattering particles for combination in composites with polymers having such low refractive indices in high ??n embodiments are high refractive index materials such as: 1) metal oxides such as titanium dioxide, zinc oxide, silica, zirconium oxide, antimony trioxide and alumina; 2) carbon phases such as diamond (n about 2.42), Lonsdaleite, and diamond-like carbon; 3) other high refractive" . .