Presentation Information
[23p-21B-4]Fabrication and Evaluation of a Three-dimensional Phononic Crystal based on a Stacked Kagome Lattice with Hinge Modes
〇(D)Yusuke Hata1, Kenji Tsuruta1 (1.Graduate School of Natural Science and Technology, Okayama Univ.)
Keywords:
higher-order topological insulator,phononic crystal,elastic wave
Three-dimensional integrated technology is expected to be promising toward realization of high-speed operating and power saving devices. However, it is difficult for elastic devices to apply this technology due to the absence of candidate structure of the waveguide perpendicular to the substrate. We propose that one-dimensional edge state appearing in a three-dimensional phononic crystal as a higher order topological insulator can be a possible candidate in the elastic system. We optimized the structure of the phononic crystal as a prototype system operated in a kHz range. Experimental evaluation of a fabricated phononic crystal will also be reported.