  On the one hand, electromagnetic dual particles preserve the helicity of
light upon interaction. On the other hand, chiral particles respond differently
to light of opposite helicity. These two properties on their own constitute a
source of fascination. Their combined action, however, is less explored. Here,
we study on analytical grounds the force and torque as well as the optical
cross sections of dual chiral particles in the dipolar approximation exerted by
a particular wave of well-defined helicity: A circularly polarized plane wave.
We put emphasis on particles that possess a maximally electromagnetic chiral
and hence dual response. Besides the analytical insights, we also investigate
the exerted optical force and torque on a real particle at the example of a
metallic helix that is designed to approach the maximal electromagnetic
chirality condition. Various applications in the context of optical sorting but
also nanorobotics can be foreseen considering the particles studied in this
contribution.
