Quasicrystals: Making invisible materials
  All-dielectric photonic quasicrystals may act as zero-refractive-index homogeneous materials despite their lack of translational symmetry and periodicity, stretching wavelengths to infinity and offering applications in light wavefront sculpting and optical cloaking. 
Svetlana V. Boriskina
physics.optics cond-mat.mes-hall cond-mat.mtrl-sci