  We demonstrate that a single sub-wavelength nanoaperture in a metallic thin
film can be used to achieve dynamic optical trapping and control of a single
dielectric nanowire. A nanoaperture can trap a nanowire, control its
orientation when illuminated by a linearly-polarized incident field, and also
rotate the nanowire when illuminated by a circularly-polarized incident field.
Compared to other designs, this approach has the advantages of a low-power
driving field entailing low heating and photodamage.
