The introduction of engineered resonance phenomena on surfaces has opened a new
frontier in surface science and technology. Pillared phononic crystals, metamaterials, and …

Research in mechanical metamaterials has achieved extreme, unprecedented properties by
exploiting inhomogeneity in the form of periodic structures, enabled by advances in digital …

We experimentally demonstrate that a rainbow-based metamaterial, created by a graded
array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by …

The phenomenon of retroreflection of light characterized by a single transversely polarized
wave has been extensively explored. However, the phenomenon of retroreflection of a …

Important distinctions are made between two related wave control mechanisms that act to
spatially separate frequency components; these so-called rainbow mechanisms either slow …

We theoretically formulate and experimentally demonstrate an analytical formalism for
designing printed circuit board (PCB) metagratings (MGs), exercising individual control over …

Metagratings have recently received much attention for effective realization of anomalous
wave steering. Governed by the diffraction grating theory and the concept of metamaterials …

We report that metamaterial-inspired one-dimensional gratings (or metagratings) can be
used to control nonpropagating diffraction orders as well as propagating ones. By accurate …

Recently, metamaterials-inspired diffraction gratings (or metagratings) have demonstrated
unprecedented efficiency in wavefront manipulation by means of relatively simple structures …

Metasurfaces have recently received much attentions for manipulating waves. However, it is
difficult to control all high-order or diffracted modes using the popularly employed …