Spin wave frequency comb generated through interaction between propagating spin wave and oscillating domain wall

Abstract

The optical frequency comb has produced a great impact on the optical field and has been exploited widely in optical frequency metrology, optical atomic clocks and precision spectroscopy. Here, we propose a new kind of frequency comb, spin-wave frequency comb. Our theoretical study shows when spin wave passes a oscillating magnetic domain wall, a comb-like frequency spectrum is generated due to the strong interaction between the propagating spin wave and the domain wall. The amplitude and the frequency spacing on the frequency comb can be manipulated by tuning the domain wall oscillation. Similar to its optical counterpart, the spin-wave frequency comb proposed here may be exploited to design new magnonic devices. Moreover, the nonlinear control of spin wave through its coupling with oscillating domain wall consumes much less energy compared to the parametic excitation, and thus, points out a new way for low power consumption manipulation of spin waves.