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 …

The introduction of engineered resonance phenomena on surfaces has opened a new
frontier in surface science and technology. Pillared phononic crystals, metamaterials, and …

Topological elastic metamaterials have emerged as a new frontier in the quest of topological
phases in condensed matter physics. Their exotic topological properties open a wealth of …

Topological insulator (TI) that possesses topologically protected characteristic of guiding the
wave against disorders and structural perturbations without backscattering has attracted …

Valley interface states, resulting in acoustic valley Hall topological insulators, have recently
become a hot topic in the study of acoustic systems. On the basis of structural diversity and …

In this work, we construct on-chip valley phononic crystal plates by building up triangular
silicon pillars on the silicon plate. We introduce the graded interface sliding for two typical …

In elastic systems, the researchers have observed the topological valley edge states.
However, the topological valley edge states can only enable elastic waves to propagate …

In this work we propose a topological valley phononic crystal plate and we extensively
investigate the refraction of valley modes into the surrounding homogeneous medium. This …

Topological phononics are well known for their topological edge states (TES) due to
backscattering immunity and pseudospin-dependent phonon transport. Here, we study two …

Here, a broadband topological valley-locked waveguide state (TVWS) of elastic wave with
adjustable mode width is reported in the phononic crystal plate with asymmetric double …