Topological valley transport of plate-mode waves in a homogenous thin plate with periodic stubbed surface

摘要: The study for exotic topological effects of sound has attracted uprising interests in fundamental physics and practical applications. Based on the concept valley pseudospin, we demonstrate transport plate-mode waves a homogenous thin plate with periodic stubbed surface, where deterministic two-fold Dirac degeneracy is form by two modes. We show that property can be controlled height stubs deposited plate. By adjusting relative heights adjacent stubs, vortex chirality band inversion are induced, giving rise to phononic analog Hall phase transition. further numerically states robust protection. Our results provide new route design unconventional elastic insulators will significantly broaden its application engineering field.