Hole-based stealthy hyperuniform semiconductor computational metamaterials for the mid-infrared

Stealthy-hyperuniform heterostructures are metamaterials with the potential for optical image processing at angles away from normal incidence. They show analogous properties to photonic crystals while circumventing the spatial anisotropy which often hinders the latter's use. In this paper, we have designed, fabricated, and characterized a hole-based stealthy-hyperuniform structure on a quantum cascade layer substrate. The infrared spectral data reveal a sizable gap-midgap ratio of 10.4% for a photonic band gap around ~12.0 μm in the form of an enhanced reflection region for increasing incidence angles. The stealthy hyperuniform metamaterial also showed spatial isotropy by its unchanging reflection spectrum for all in-plane rotational angle measurements.