[15p-K501-1~12] 22.1 Joint Session M "Phonon Engineering"

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)

[15p-K501-10] Design of topological spin-Hall waveguides in a triangular lattice wave machine

〇(B)Hiromi Kurano¹, Haruki Sasai¹, Osamu Matsuda¹, Motonobu Tomoda¹ (1.Hokkaido Univ.)

Keywords:

topological phononics,phononic crystal,mechanical metamaterial

Compared to conventional waveguides used for wave transmission, topological waveguides exhibit robust characteristics against bends and defects, making them a promising new type of waveguide. We fabricated a spin-Hall waveguide for elastic waves in a macroscopic system using a triangular lattice two-dimensional wave machine and demonstrated topological boundary modes at low frequency. The triangular lattice structure offers the advantage of allowing adjustments to the waveguide's configuration after design. Furthermore, we evaluated its characteristics through comparisons between simulations and experiments.