2026/04/15 by Kanta Mori, Takumi Koguchi, Toshiaki Watanabe +6 · 1 voice
Engineering · Materials Science · Physics and Astronomy · #Metamaterials and Metasurfaces Applications #Photonic Crystals and Applications #Plasmonic and Surface Plasmon Research
paper · doi:10.1103/m64z-lh2m
openalex publication_date 2026/04/15 · openalex created_date 2026/04/16 · openalex updated_date 2026/07/21
Guiding spin wave (SW) signals around turns in integrated magnonic circuits remains a challenge. Here, we calculated efficient SW transmission through Z-shaped turns of 120° using low-loss magnonic crystal (MC) waveguides comprising yttrium iron garnet (YIG) and a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>Cu</a:mi> </a:math> hole array. The MCs were optimized using a finite integration technique, showing a complete magnonic band gap with a width of 15.1 MHz at a center frequency of 1.811 GHz. The MC waveguide showed 5.7 × <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:msup> <c:mn>10</c:mn> <c:mn>3</c:mn> </c:msup> </c:math> times stronger SW propagation than ridge-type waveguides by avoiding SW depression caused by inhomogeneous internal magnetic field distributions in the YIG film. The effect of the bending radius on the SW propagation was evaluated through simulations. The proposed MC waveguide plays a vital role in SW waveguide integration by maintaining homogeneous magnetic field distributions throughout the unprocessed YIG film.