Absence of red structural color in photonic glasses, bird feathers, and certain beetles
Absence of red structural color in photonic glasses, bird feathers, and certain beetles
Colloidal glasses, bird feathers, and beetle scales can all show structural colors arising from short-ranged spatial correlations between scattering centers. Unlike the structural colors arising from Bragg diffraction in ordered materials like opals, the colors of these photonic glasses are independent of orientation, owing to their disordered, isotropic microstructures. However, …