  Magnons in antiferromagnets can support both right-handed and left-handed
chiralities, which shed a light on the chirality-based spintronics. Here we
demonstrate the switching and reading of magnon chirality in an artificial
antiferromagnet. The coexisting antiferromagnetic and ferromagnetic
characteristic resonance modes are discovered, which permits a high tunability
in the modulation of magnon chirality. The reading of the chirality is
accomplished via the chirality-dependent spin pumping as well as spin
rectification effect. Our result illustrates an ideal antiferromagnetic
platform for handling magnon chirality and paves the way for chirality-based
spintronics.
