Phononic crystals (PCs) and metamaterials (MMs) can exhibit abnormal properties, even far
beyond those found in nature, through artificial design of the topology or ordered structure of …

Metamaterials and devices that provide cloaking functionalities have strong potential to
bring fundamental scientific and engineering developments including invisibility, sound and …

The advancement in electromagnetic metamaterials, which commenced three decades ago,
experienced a rapid transformation into acoustic and elastic systems in the forms of …

Guiding classical waves has inspired a wealth of nontrivial physics and significant
applications. To date, a robust and compact way to guide energy flux traveling along an …

Metasurfaces are planar metamaterials with a flat surface and a subwavelength thickness
that are able to shape arbitrary wave fronts such as focusing or imaging. There is a broad …

A severe limitation of current acoustic metasurfaces remains in their modest tunability to
meet multifrequency requirements and alterable functionalities on demand. Here, a …

The elastic metasurface with compact design and easy fabrication has provided some
insight into applications of solid wave-based field owing to its novel wavefront-shaping …

Due to their limited number of units but outstanding ability to control rather complex wave-
propagation phenomena, acoustic coding metasurfaces (ACMs) as two-dimensional …

Elastic metasurfaces have become one of the most promising platforms for manipulating
mechanical wavefronts with the striking feature of ultra-thin geometry. The conventional …

We theoretically and experimentally investigate a helical acoustic metasurface capable of
providing a modulated sound-reflected wavefront and a continuously tunable broadband …