Hongcheng Gu, Yuanjin Zhao, Yao Cheng, Zhuoying Xie, Fei Rong, Jiaqi Li, Baoping Wang, Degang Fu and Zhongze Gu Tailoring Colloidal Photonic Crystals with Wide Viewing Angles Small 9
Photonic crystal materials are developed from colloidal crystal fibers or beads. As the fibers have cylindrical symmetry, the fiber-composed PhCs show anisotropic angle independence. By contrast, the bead-composed PhCs display angle-independent structural colors because of the spherical symmetry of their bead elements.
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