Acoustic metasurfaces derive their characteristics from the interaction between acoustic
waves and specifically designed materials. The field is driven by the desire to control …

The coupling of waves between the piezoelectric generators, detectors, and propagating
media is challenging due to mismatch in the acoustic properties. The mismatch leads to the …

Within a time span of 15 years, acoustic metamaterials have emerged from academic
curiosity to become an active field driven by scientific discoveries and diverse application …

In this study, we show that robust and tunable acoustic asymmetric transmission can be
achieved through gradient-index metasurfaces by harnessing judiciously tailored losses. We …

The fine manipulation of sound fields is critical in acoustics yet is restricted by the coupled
amplitude and phase modulations in existing wave-steering metamaterials. Commonly …

Over the past 5 years, digital coding and programmable metamaterials have been
developed rapidly since their first exhibition in 2014. The iconic feature of the digital coding …

Conventional phased arrays require a large number of sources in forming a complex wave
front, resulting in complexity and a high cost to operate the individual sources. We present a …

Controlling acoustic fields is crucial in diverse applications such as loudspeaker design,
ultrasound imaging and therapy or acoustic particle manipulation. The current approaches …

Phase gradient metagratings (PGMs) have provided unprecedented opportunities for
wavefront manipulation. However, this approach suffers from fundamental limits on …

The concept of a metasurface opens new exciting directions to engineer the refraction
properties in both optical and acoustic media. Metasurfaces are typically designed by …