[vaseline2008]

Just proof of concept, moving tiny (and I mean tiny) objects.
NYU Professors Develop Real-Life Star Trek Tractor Beam

In a paper entitled “Optical Conveyors: A Class of Active Tractor Beams,” David Ruffner and David Grier describe how they were able to pull 30 micrometer-sized silica spheres suspended in water, towards a laser source, the site reports.