摘要: The spectacular iridescence of natural opals is caused by light scattering from ordered arrays dielectric material in these prized gemstones. As a result, there much interest synthesizing artificial opalescent materials as photonic materials. In his Perspective, van Blaaderen discusses results reported the same issue by Zakhidov et al. showing that cubic graphite, an material, has been synthesized. method used authors, combination with other techniques for making band gap crystals, likely to yield new range optical