Topological acoustics is an emerging field that lies at the intersection of condensed matter
physics, mechanical structural design and acoustics engineering. It explores the design and …

Recent research in topological photonics has not only proposed and realized novel
topological phenomena such as one‐way broadband propagation and robust transport of …

Light and sound are the most ubiquitous forms of waves, associated with a variety of
phenomena and physical effects such as rainbows and echoes. Light and sound, both …

The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

The study of classical wave physics has been reinvigorated by incorporating the concept of
the geometric phase, which has its roots in optics, and topological notions that were …

The studies of topological phases of matter have been developed from condensed matter
physics to photonic systems, resulting in fascinating designs of robust photonic devices …

Topological insulators with unique edge states have revolutionized the understanding of
solid-state materials. Recently, higher-order topological insulators (HOTIs), which host both …

The quantum spin Hall effect lays the foundation for the topologically protected manipulation
of waves, but is restricted to one-dimensional-lower boundaries of systems and hence limits …

Acoustic metamaterials can manipulate and control sound waves in ways that are not
possible in conventional materials. Metamaterials with zero, or even negative, refractive …

The concept of valley pseudospin, labelling quantum states of energy extrema in momentum
space, is attracting attention,,,,,,,,,,,, because of its potential as a new type of information …