MATERIALS AND SYSTEMS FOR 2-PHOTON 3-D ROM DEVICES

The methods and systems used for storing and accessing information in three dimensions by means of two-photon absorption are described, The materials into which the information is stored are organic molecules d ispersed in polymer matrices, which change structure and spectra after absorption of light, The writing and accessing of the information can be performed either bit-by-bit or in a two-dimensional (2-D) multibit plane format, Automated recording and readout three-dimensional (3-D) systems have been constructed and characterized, Channel error source s have been identified, and a custom spatial bit-error-rate test has b een developed.