Acoustic metamaterials (AMs), which are materials composed of subwavelength periodic
artificial structures with specific designs, have drawn significant research attention. This is …

Photoluminescence including fluorescence plays a great role in a wide variety of
applications from biomedical sensing and imaging to optoelectronics. Therefore, the …

Perfect, broadband and asymmetric sound absorption is theoretically, numerically and
experimentally reported by using subwavelength thickness panels in a transmission …

Metasurfaces open up unprecedented potential for applications in acoustic deflection.
Achieving adaptive control of a scattered sound field (SSF) using a flexible metasurface …

The ability to slow down wave propagation in materials has attracted significant research
interest. A successful solution will give rise to manageable enhanced wave–matter …

Metasurfaces open up unprecedented potential for wave engineering using subwavelength
sheets. However, a severe limitation of current acoustic metasurfaces is their poor …

Previously reported acoustic metasurfaces consisting of fixed channels are untunable to
meet broadband requirements and alterable functionalities. To overcome this limitation, we …

We numerically and experimentally investigate spatially programmable rainbow trapping
and band-gap enhancement using a graded piezoelectric metamaterial beam with unit cells …

The rainbow reflection effect describes the broadband spatial separation of wave spectral
components caused by a spatially graded array of resonators. Although mainly studied in …

Unlike conventional metamaterials with a periodic array of identical resonators, rainbow
metamaterials consist of an array of discrete resonators with a spatially varying parameter …