[22p-B202-1~16] 1.6 Ultrasonics

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[22p-B202-1] [Young Scientist Presentation Award Speech] Propagation of Higher Order Topological Elastic Wave with Stacked Kagome Lattice Three-dimensional Phononic Crystals

〇Yusuke Hata¹, Masaaki Misawa², Kenji Tsuruta¹ (1.Dept. of Electrical and Electronic Eng., Okayama Univ., 2.Faculty of Eng., Fukuoka Inst. of Technol.)

Keywords:

higher-order topological insulator,phononic crystal,elastic wave

Three-dimensional integrated technology is expected to 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 a waveguide perpendicular to the substrate. We show a topological hinge mode along the stacked direction in a stacked Kagome lattice three-dimensional phononic crystal with numerical calculations. We also discuss about selective transportation of in-plane elastic wave in bilayer structures.