Influence of POSS modifier on NLO properties of the hybrid materials

The nonlinear optical （NLO） active chromophore was prepared bv a bridging agent, glyeidyl ether （ AGE）, to connect disperse orange 3 （ DO3 ） and （ γ-Methaerylpropyl）-silsesquioxane （MP-SSO）. A freeradical polymerization was performed to fabricate the methacrylate/Silica hybrid NLO films. Different amounts （ 5-25 wt% ） of （γ-methacrylpropyl） -polyhedral oligomeric silsesquioxanes （POSS） were added as the modifier to improve the degree of cross-linking, density and structure of the NLO matrix. As a result, the modified material properties including coating transmittance, glass transition temperature （ Tg ） , absoption spectra before and after poling, Marker stripes, etc. were presented. The hybrid film containing 15 wt% POSS exhibits the highest T, nonresonant second-order nonlinearity （d33 = 92 pro/V） and temporal stability among the others.