Facile organic photorefractive (PR) composites with favorable PR performance under no external electric field

Abstract Facile photorefractive (PR) composite films were prepared. As evidence of PR effect of the PR composite films, two-beam coupling (TBC) experiment were carried out at 633 nm wavelength. Interestingly, strong energy transfers appeared under zero external electric field ( E ex ). The highest TBC gain coefficient is up to 230.32 cm −1 . The TBC gain coefficient increases with the increase of photosensitizer within certain range. The probable cause of PR effect under non-external electric field were proposed.