The last 20 years have witnessed growing impacts of the topological concept on the
branches of physics, including materials, electronics, photonics, and acoustics. Topology …

Accidental degeneracy plays an important role in the generation of novel band dispersions.
Photonic structures that exhibit an accidental Dirac-like conical dispersion at the center of …

Topological phononic states, which facilitate unique acoustic transport around defects and
disorders, have significantly revolutionized our scientific cognition of acoustic systems. Here …

The ability to create directional sound beams is fundamental to acoustic sensing.
Traditionally, acoustic beams are most commonly produced by phased arrays, which …

To show the effects of active feedback control on elastic wave metamaterials, this research is
focused on effective mass density and sound radiation by a point force excitation. The …

New scientific investigations of artificially structured materials and experiments have
exhibited wave manipulation to the extreme. In particular, zero refractive index …

We propose a general procedure to study double integrals arising when considering wave
propagation in periodic structures. This method, based on a complex deformation of the …

Dirac materials are of great interest as condensed matter realizations of the Dirac and Weyl
equations. In particular, they serve as a starting point for the study of topological phases …

In this paper, simultaneous zero refractive indices (ZRIs) for both sound and light are
realized on the basis of a 2D triangular lattice phoxonic crystal (PxC) with C 6 v symmetry …

Acoustic metamaterials have high potential in diverse applications, including acoustic
cloaking, sound tunneling, wavefront reshaping, and sound insulation. In the present study …