  We propose an enantioselective scheme to sort homogeneous chiral particles
using optical tweezers. For a certain range of material parameters, we show
that a highly focused circularly-polarized laser beam traps particles of a
specific chirality selected by the handedness of the trapping beam.
Furthermore, by applying a transverse Stokes drag force that displaces the
trapped particle off-axis, we allow for the rotation of the particle
center-of-mass around the trapping beam axis. The rotation angle is highly
dependent on the handedness of the trapped particle and is easily measurable
with standard video-microscopy techniques, allowing for an alternative
mechanism for chiral resolution. Our platform not only allows for
enantioselection of particles dispersed in solution but also paves the way to
the characterization of the chiral parameter of individual, homogeneous chiral
microspheres using optical tweezing.
