Antiferromagnetic magnons possess a distinctive feature absent in their ferromagnetic counterparts: the presence of two distinct handedness modes, the right-handed (RH) and left-handed (LH) precession modes. The magnon handedness determines the sign of spin polarization carried by the propagating magnon, which is indispensable for harnessing the diverse functionalities in magnonic devices, such as data encoding, magnon polarization-based logic systems, and quantum applications involving magnons. However, the control of coherently propagating magnon handedness in antiferromagnets has remained elusive. Here we demonstrate the manipulation and electrical readout of propagating magnon handedness in perpendicularly magnetized synthetic antiferromagnets (SAF). We find that the antiferromagnetic magnon handedness can be directly identified by measuring the inverse spin Hall effect (ISHE) voltage, which arises from the spin pumping effect caused by the propagating antiferromagnetic magnons in the SAF structure. The RH and LH modes of the magnon can be distinguishable when the SAF structure is sandwiched by heavy metals with the same sign of spin Hall angle. This work unveils promising avenues for harnessing the unique properties of antiferromagnetic magnons.

反铁磁磁振子具有铁磁磁振子所没有的显着特征：存在两种不同的旋向模式，即右旋 （RH） 和左旋 （LH） 岁差模式。磁振子的旋向性决定了传播磁振子携带的自旋极化符号，这对于利用磁振子器件中的各种功能是必不可少的，例如数据编码、基于磁振子极化的逻辑系统和涉及磁振子的量子应用。然而，在反铁磁体中相干传播的磁振子旋向的控制仍然难以捉摸。在这里，我们演示了在垂直磁化合成反铁磁体 （SAF） 中传播磁振子旋性的操作和电读数。我们发现，反铁磁磁子旋向可以通过测量逆自旋霍尔效应 （ISHE） 电压来直接识别，该电压是由 SAF 结构中传播的反铁磁磁子引起的自旋泵效应引起的。当 SAF 结构被具有相同自旋霍尔角符号的重金属夹住时，可以区分磁振子的 RH 和 LH 模式。这项工作揭示了利用反铁磁磁振子独特特性的有前途的途径。