Figure 6
From: Controllable light capsules employing modified Bessel-Gauss beams
Optical trapping of core-shell magnetic microparticles with light capsules.
(a) The magnetic particle is trapped in the center of the light capsule first. When we move the chamber along the vertical direction, although the particles accordlingly deviate from the center upwards (b,c) or downwards (e–g), they cannot escape the optical bottle eventually. Once moving stops, the particles will stay for a little time near the upper (d) or lower (h) boundary of the light capsule and then move towards the center. (i–p) The similar pocess of manipulating a magnetic particle but along horizontal direction. The circles indicate the range of the light capsules and the arrows respresent the directions of the flowing fluid.
