2016/03/17 by Weichao Yu, Jin Lan, Ruqian Wu +1 · 80 citations
Computer Science · Engineering · Physics and Astronomy · #Condensed matter physics #Dissipation #Ferromagnetism #Magnetic domain #Magnetic field #Magnetic properties of thin films #Magnetization #Magneto-Optical Properties and Applications #Magnon #Magnonics #Neural Networks and Reservoir Computing #Optics #Physics #Quantum mechanics #Reflection (computer programming) #Refraction #Scattering #Snell's law #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Spin wave #Total internal reflection #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.94.140410
published in Physical review. B./Physical review. B 94(14) (American Physical Society) · 5 pages, 3 figures
arxiv created 2016/03/17 · openalex created_date 2016/06/24 · openalex publication_date 2016/10/11 · arxiv updated 2016/10/19 · openalex updated_date 2026/08/05
Spin waves are collective excitations propagating in the magnetic medium with ordered magnetizations. Magnonics, utilizing the spin wave (magnon) as an information carrier, is a promising candidate for low-dissipation computation and communication technologies. We discover that, due to the Dzyaloshinskii-Moriya interaction, the scattering behavior of the spin wave at a magnetic domain wall follows a generalized Snell's law, where two magnetic domains work as two different mediums. Similar to optical total reflection that occurs at water-air interfaces, spin waves may experience total reflection at the magnetic domain walls when their incident angle is larger than a critical value. We design a spin-wave fiber using a magnetic domain structure with two domain walls, and demonstrate that such a spin-wave fiber can transmit spin waves over long distances by total internal reflections, in analogy to an optical fiber.