Abstract Only NONLINEAROPTICAL PROPERTIES AND NONUNEAR OPTICAL PROBES OF ORGANICMATERIALS Gerald R. MeredithCentral Research and Development Department The DuPont Co.Wilmington, Delaware 19880-0356 Nonlinear optical processes and electro-oplical effects are expected to have increasingimportance as the information age matures and photonics augnnt electronics in various highdensity and high bandwidth technologies. Whereas for electronics the emphasis is in construction of smaller device structures from a few parent materials, for organic materials thedirection of materials research has been reversed. For some time it's been known that somemolecular structures engender exceptionally large molecular nonlinear-polarization responses.If such molecules could be assembled in convenient, versatile and reliable ways, the resultingmaterials would be very useful or even enabling in various photonics applications. The maturescience and art of chemistry allows very good control over molecular composition and structure