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We calculate optical forces and torques exerted on a chiral dipole by chirallight fields and reveal genuinely chiral forces in combining the chiralcontents of both light field and dipolar matter. Here, the optical chirality ischaracterized in a general way through the definition of optical chiralitydensity and chirality flow. We show in particular that both terms havemechanical effects associated respectively with reactive and dissipativecomponents of the chiral forces. Remarkably, these chiral force components aredirectly related to standard observables: optical rotation for the reactivecomponent and circular dichroism for the dissipative one. As a consequence, theresulting forces and torques are dependent on the enantiomeric form of thechiral dipole. This suggests promising strategies for using chiral light forcesto mechanically separate chiral objects according to their enantiomeric form.

Mechanical separation of chiral dipoles by chiral light