Reconfigurable Spin-Wave Interferometer at the Nanoscale
Reconfigurable Spin-Wave Interferometer at the Nanoscale
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DOI：
10.1021/acs.nanolett.1c02010
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发表时间：
2021-07-16
期刊：
影响因子：
10.8
通讯作者：
Yu, Haiming
中科院分区：
文献类型：
--
作者：
Chen, Jilei;Wang, Hanchen;Yu, Haiming
自旋波可以在没有电子传输的情况下传递信息，有望成为低功耗的基于波的计算技术，作为现代电子产品严重能量损失的解决方案。基于自旋波干涉的逻辑电路已经被提出了十多年，但还没有在纳米尺度上实现。在这里，我们演示了低阻尼磁绝缘体中波长为SO nm的自旋波的干涉。利用传播自旋波谱在频域中探测到了自旋波的相长干涉和相消干涉，布里渊散射进一步证实了这一点。干涉图样对作为自旋波发射体的两根磁性纳米线之间的距离高度敏感。通过控制磁配置，人们可以打开和关闭自旋波干涉仪。因此，我们的演示是实现基于非易失性纳米磁体的自旋波计算系统的关键。
Spin waves can transfer information free of electron transport and are promising for wave-based computing technologies with low-power consumption as a solution to severe energy losses in modern electronics. Logic circuits based on the spin-wave interference have been proposed for more than a decade, while it has yet been realized at the nanoscale. Here, we demonstrate the interference of spin waves with wavelengths down to SO nm in a low-damping magnetic insulator. The constructive and destructive interference of spin waves is detected in the frequency domain using propagating spin-wave spectroscopy, which is further confirmed by the Brillouin light scattering. The interference pattern is found to be highly sensitive to the distance between two magnetic nanowires acting as spin-wave emitters. By controlling the magnetic configurations, one can switch the spin-wave interferometer on and off. Our demonstrations are thus key to the realization of spin-wave computing system based on nonvolatile nanomagnets.