Laser manipulation applies to particles like atoms, large molecules and small dielectric objects, in the size range of tens of nanometers to tens of micrometers. Optical manipulation also applies to particles of biological interest like viruses, living cells and organelles within a cell, thus having a major impact in many aspects of biology in which contact-free manipulation is required. The dynamic manipulation of arrays of trapped objects extends the possible applications: here the manipulation of two and three dimensional particles arrays for applications in cell sorting, tissue...