We propose topological metamaterials working in Hertz frequency range, constituted of concrete pillars on the soil ground a honeycomb lattice. Based analog quantum valley Hall effect, non-trivial bandgap is formed by breaking inversion symmetry unit cell. A interface created between two different crystal phases whose robustness against various defects and disorders quantitatively analyzed. Fina...

• Proposed the inverse nonlinearity and applied it in a metamaterial beam. The bandgap is amplitude-depended become wider under small excitations. digital oscillator for flexible realization of various nonlinearities. Strong usually becomes noticeable when nonlinear materials or structures undergo large deformation. However, we present here nonlinearity, where inversely proportional to We demon...

Fiber Bragg gratings (FBGs) have previously found many applications as strain and vibration sensors. Here we demonstrate that they may also be employed as pickups for musical instruments and, specifically, for acoustic guitars and solid-body electric guitars. By fixing the FBG to a vibrating part of the instrument's body, e.g., near the bridge of an acoustic guitar or on the headstock of a soli...