Reconfigurable Spin-Wave Interferometer at the Nanoscale
Jilei Chen, Hanchen Wang, Tobias Hula, Chuan‐Pu Liu, Song Liu, Tao Liu, Hao Jia, Qiuming Song, Chenyang Guo, Yuelin Zhang, Jinxing Zhang, Xiufeng Han, Dapeng Yu, Mingzhong Wu, Helmut Schultheiß, Haiming Yu
Abstract
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 50 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.