  The recent emergence of chirality in mechanical metamaterials has
revolutionized the field, enabling achievements in wave propagation and
polarization control. Despite being an intrinsic feature of some molecules and
ubiquitous in our surroundings, the incorporation of chirality into mechanical
systems has only gained widespread recognition in the last few years. The extra
degrees of freedom induced by chirality has propelled the study of systems to
new heights, leading to a better understanding of the physical laws governing
these systems. In this study, we present a structural design of a butterfly
meta-structure that exploits the chiral effect to create a 3D chiral butterfly
capable of inducing a rotation of 90{\deg} in the plane of polarization,
enabling a switch between various polarization states within a solid material.
Furthermore, our numerical investigation using Finite Element Analysis (FEA)
has revealed an unexpected conversion of compressional movement to transverse
movement within these structures, further highlighting the transformative
potential of chirality in mechanical metamaterials. Thus, revealing an
additional degree of freedom that can be manipulated, namely the polarization
state.
