Manipulation with micro-objects by nonzero orbital moment beams

The major directions of manipulations with micro objects by laser beams are considered. Using spiral beams can essentially extend the potential of manipulation. In ray optics approximation the calculation of the torque transmitted from a spiral beam to an absorbing particle is made in accordance with the wave optics. The experimental observation of torque transfer from non zero orbital moment beams to particles trapped into the laser beam focus is described.© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.