  Polarization, the precession direction with respect to the background
magnetization, is an intrinsic degree of freedom of spin wave. Introducing
symmetry breaking mechanisms lies in the heart of lifting the degeneracy
between polarized spin wave modes, and is essential in constructing
polarization-based magnonic devices. Here we show that polarized spin waves can
be naturally harnessed in a curved antiferromagnetic wire via tuning its
curvature and torsion. Specifically, we investigate evolution of polarized spin
wave in a spin wave rotator and a spin wave interferometer based on magnetic
circular helices, and correlate these curvilinear effects to the Berry phase
accumulated along wires.
