Interaction of light and matter on the nanoscale. see University of Rochester - Institute of Optics - NANOOPTICS GROUP NanoPGM - nanometer-scale patterned granular motion: The goal of NanoPGM is to generate millions of “nanofingers,” finger-like structures each only a few nanometers long, that might someday perform precise, massively parallel manipulation of molecules and directed assembly of other nanometer-scale objects. This ability answers one of the biggest technical challenges facing builders of nanocomputers: how to arrange as many as a trillion molecular computing components in an area only a few millimetres square.