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 …

Phononic crystals (PnCs) control the transport of sound and heat similar to the control of
electric currents by semiconductors and metals or light by photonic crystals. Basic and …

Topologically gapless edge states, characterized by topological invariants and Berry's
phases of bulk energy bands, provide amazing techniques to robustly control the …

Realizing directional acoustic signal transmittance and reception robust against surrounding
noise and competing signals is crucial in many areas such as communication, navigation …

Topological photonics is a rapidly emerging field of research in which geometrical and
topological ideas are exploited to design and control the behavior of light. Drawing …

By employing periodic electrical boundary conditions, an innovative method to generate
actively tunable topologically protected interface mode in a “homogeneous” piezoelectric …

Artificial gauge fields are currently realized in a wide range of physical settings. This
includes solid-state devices but also engineered systems, such as photonic crystals …

Topological acoustics has recently revolutionized fundamental concepts of acoustic
propagation, giving rise to strikingly unique acoustic edge modes immune to backscattering …

Topological protected wave engineering in artificially structured media is at the frontier of
ongoing metamaterials research that is inspired by quantum mechanics. Acoustic analogues …

Valley pseudospin, labeling the pair of energy extrema in momentum space, has been
attracting attention because of its potential as a new degree of freedom in manipulating …