Techniques for ultrastructure synthesis: stabilization of large second-order optical nonlinearities of poled polymers

摘要

Abstract: Ultrastructure synthesis techniques for stabilization of large second order optical nonlinearities of poled polymers are reviewed. These techniques include covalent attachment of chromophores onto polyimide backbones, use of double-end crosslinkable chromophores, crosslinking of main-chain polymers with chromophores as polymer backbone components, and in-situ poling and polymerization of chromophores with multiple functionalities. By using these techniques, second harmonic generation coefficients, measured at 1064 nm wavelength, on the order of 10$+$MIN@7$/ esu and long term stability of optical nonlinearity at 90 - 125$DEG@C have been realized.!30