Optical trapping has become a powerful tool in numerous fields such as biology, physics, chemistry. In light-matter interaction, transfer of optical linear momentum and angular momentum gives rise to optical forces acting on the illuminated object, thus enabling the acceleration, three-dimensional (3-D) confinement, spinning, rotation, and even negative pulling of particles.
Click here for original story, Simultaneous optical trapping and imaging in the axial plane for light-matter interaction
Source: Phys.org