The Role of Snell’s Law for a Magnonic Majority Gate

  • Authors:
    Naoki Kanazawa (Toyohashi Univ. of Tech.), Taichi Goto (Toyohashi Univ. of Tech.), Koji Sekiguchi (Keio Univ.), Alexander Granovsky (Moscow State), Caroline Ross (MIT), Hiroyuki Takagi (Toyohashi Univ. of Tech.), Yuichi Nakamura (Toyohashi Univ. of Tech.), Hironaga Uchida (Toyohashi Univ. of Tech.), Mitsuteru Inoue (Toyohashi Univ. of Tech.)
    Publication ID:
    P090800
    Publication Type:
    Paper
    Received Date:
    1-May-2017
    Last Edit Date:
    8-Nov-2017
    Research:
    2382.001 (Yale University)

Abstract

In the fifty years since the postulation of Moore’s Law, the increasing energy consumption in silicon electronics has motivated research into emerging devices. An attractive research direction is processing information via the phase of spin waves within magnonic-logic circuits, which function without charge transport and the accompanying heat generation. The functional completeness of magnonic logic circuits based on the majority function was recently proved. However, the performance of such logic circuits was rather poor due to the difficulty of controlling spin waves in the input junction of the waveguides. Here, we show how Snell’s law describes the propagation of spin waves in the junction of a Ψ-shaped magnonic majority gate composed of yttrium iron garnet with a partially metalized surface. Based on the analysis, we propose a magnonic counterpart of a core-cladding waveguide to control the wave propagation in the junction. This study has therefore experimentally demonstrated a fundamental building block of a magnonic logic circuit.

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