NONLINEAR PHENOMENA IN ORGANIC MULTILAYERS

In the last years there has been a surge of interest in the study of l ayered systems grown by organic molecular beam deposition. Such a prog ress has prompted us to consider novel layered structures containing e ither heterojunctions between a molecular solid and an inorganic semic onductor or donor-acceptor interfaces between crystalline organic mate rials. Here, we review the striking resonant and non-resonant optical nonlinearities and electro-optical effects associated with the hybrid excitons and the interface charge transfer excitons characteristic of such systems.