4.8 Article

Reconfigurable nanoscale spin-wave directional coupler

Journal

SCIENCE ADVANCES
Volume 4, Issue 1, Pages -

Publisher

AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1701517

Keywords

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Funding

  1. European Research Council [678309]
  2. Ministry of Education and Sciences of Ukraine [0115U002716]
  3. U.S. NSF [ECCS-1305586, EFMA-1641989]
  4. U.S. Army TARDEC (Tank Automotive Research, Development and Engineering Center)
  5. RDECOM (Research, Development and Engineering Command)
  6. Center for NanoFerroic Devices (CNFD)
  7. Nanoelectronics Research Initiative (NRI)

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Spin waves, and their quanta magnons, are prospective data carriers in future signal processing systems because Gilbert damping associated with the spin-wave propagation can be made substantially lower than the Joule heat losses in electronic devices. Although individual spin-wave signal processing devices have been successfully developed, the challenging contemporary problem is the formation of two-dimensional planar integrated spin-wave circuits. Using both micromagnetic modeling and analytical theory, we present an effective solution of this problem based on the dipolar interaction between two laterally adjacent nanoscale spin-wave waveguides. The developed device based on this principle can work as a multifunctional and dynamically reconfigurable signal directional coupler performing the functions of a waveguide crossing element, tunable power splitter, frequency separator, or multiplexer. The proposed design of a spin-wave directional coupler can be used both in digital logic circuits intended for spin-wave computing and in analog microwave signal processing devices.

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