[20a-A23-1~5] Vibronics: Energy transport science of vibrations in solid

11:20 AM - 11:50 AM JST(2:20 AM - 2:50 AM UTC)English Presentation

[20a-A23-5] Vibration transport at topological edges of mechanical metamaterials

〇Motonobu Tomoda¹ (1.Hokkaido Univ.)

Keywords:

topology,metamaterial,phonon

Topological phononic crystal waveguides exhibit inherent robustness against bends and defects, thereby preventing backscattering. This promises the realization of more efficient waveguides and non-reciprocal acoustic devices. We have developed mechanical metamaterials that extend a wave machine into two dimensions to achieve vibration propagation through topological edge modes and to experiment with further control methods. In our efforts to realize a quantum Hall system, we created a honeycomb lattice wave machine capable of maintaining its equilibrium position despite rotation induced by centrifugal force. Similarly, for the realization of a quantum valley Hall system, we designed and implemented a suspended honeycomb lattice wave machine. The vibrations of these wave machines were quantitatively measured using a motion capture system and compared with theoretical and simulation results.