SYNTHESIS AND CROSSLINKING OF FUNCTIONALIZED EPOXY POLYMERS AND SECOND-ORDER NONLINEAR OPTICAL CHARACTERISTICS

摘要

Nonlinear optical(NLO) polymers have attracted much attention due to the potential application in a number of photonics technologies. However, their NLO properties, arising from the noncentrosymmetry of chromophores achieved by electric field poling above T_g, are still unstable even at temperature below T_g owing to the slow relaxation of chromophore alignment. Recently, crosslinking after poling is one way to overcome this problem and enhance the stability of NLO properties.