Microwave frequency combs through the rotational enhanced magnetostrictive effect

Microwave frequency combs have attracted particular attention due to their great application prospects in microwave communication and measurement. In recent years, the scheme of generating microwave frequency combs based on an optical method has been widely concerned; however, the investigation of obtaining microwave frequency combs based on a magnetic method has rarely been reported. Here, an efficient mechanism for the generation of microwave frequency combs induced by the rotational enhanced magnetostrictive effect is theoretically proposed. The results show that the magnetostrictive interaction can be greatly enhanced by introducing the Sagnac effect, and then a robust microwave frequency comb can be observed even at low power. Furthermore, when we change the incidence direction of the driving field, the generation of microwave frequency combs has strong nonreciprocity. Our propose thus provides a pathway for the generation of a flat microwave frequency comb based on magnonic platforms that may be beneficial for microwave frequency metrology and spectroscopy, as well as an in-depth understanding of magnomechanical nonlinearity.