Advances in additive manufacturing techniques have enabled the creation of stimuli-
responsive materials with designed three-dimensional (3D) architectures. Unlike biological …

The valley degree of freedom in crystals offers great potential for manipulating classical
waves, however, few studies have investigated valley states with complex wavenumbers …

Acoustic metasurfaces offer unique capabilities to steer and direct acoustic fields, though
these are generally composed of complex 3D structures, complicating their fabrication and …

Wave fields with orbital angular momentum (OAM) have been widely investigated in
metasurfaces. By engineering acoustic metasurfaces with phase gradient elements, phase …

The trade‐off between processability and functional responses presents significant
challenges for incorporating piezoelectric materials as potential 3D printable feedstock …

Metasurfaces, the ultra-thin media with extraordinary wavefront modulation ability, have
shown great promise for many potential applications. However, most of the existing …

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

From being an unfavorable consequence to finding itself as the intended imaginary part of a
non-Hermitian system, loss has truly emerged as more of a friend than a foe in the context of …

Metagratings are a recently proposed class of metasurfaces for efficient manipulation of an
im**ing wavefront within a subwavelength layer. They avoid the requirement for fine …

In this work, we designed and studied a feasible dual-layer binary metagrating, which can
realize controllable asymmetric transmission and beam splitting with nearly perfect …