标题： 磁控纳米级自旋波垂直方向耦合器 显示英文标题

标题： Magnetic field-controlled nanoscale spin-wave vertical directional coupler

摘要： 定向耦合器是基于波的电路中的基本元件。 自旋波定向耦合器的最新技术主要由宏观波导或二维平面系统组成。 在本文中，我们提出了一个纳米级的自旋波垂直定向耦合器的设计，其效率非常高，超过99.5%。 我们证明，耦合器的操作可以通过外部磁场的大小进行控制。 此外，它还可以对自旋波信号进行复用和解复用。 这样的器件应该会成为三维磁子电路中的关键元件。 显示英文摘要

摘要： The directional coupler is a fundamental element of wave-based circuits. The state of the art for the spin-wave directional couplers consists mostly of macroscopic waveguides or two-dimensional planar systems. In this Letter, we present the design of the nanoscale spin-wave vertical directional coupler with a very high efficiency exceeding 99.5%. We demonstrate that the operation of the coupler can be controlled by the magnitude of the external magnetic field. Moreover, it can perform multiplexing and demultiplexing of the spin-wave signal. Such a device ought to become an essential element of the three-dimensional magnonic circuits.