Pinnow, M.M.PinnowDanz, R.R.Danz2022-03-082022-03-081996https://publica.fraunhofer.de/handle/publica/303490The invention relates to a process for writing and reading out information by means of an electrical field in an information storage layer which contains a polarizable polymer film (active layer), whereby the following steps are performed: a) unipolar orientation of the dipoles of the active layer, b) writing the information by applying an electrical counterfield, c) reading out the information by means of a non-linear optical process.de608668patent1994-4409851