Figure 5.

Schematic illustration of the experimental set-up used to simultaneously create multiple HOPS beam optical traps. An example multiplexed hologram pair used to generate two scalar beams traversing along two separate paths is shown in the insert on the right. Insert 1 shows example HOPS beams with radial and azimuthal polarization distributions. The generated vector beams were simultaneously directed into the microscope objective to create multiple optical traps. An inverted microscope comprising white light source, dichroic mirror, lens and CCD camera was used to image the trapped beads. Insert 2 shows an experimental image of a vertical array of vector beams in the trapping plane as observed on the CCD through back reflection off the sample container.