High glass transition temperature syndioregic second-order non-linear optical polymer in Langmuir–Blodgett–Kuhn films

Abstract We report here recent progress toward the goal of processing polymers near room temperature to produce all-polymeric non-linear optical films which may ultimately find application as active waveguides. Polymers designed for spin-casting were found to be processable by the Langmuir–Blodgett–Kuhn (LBK) technique. The T g of the bulk polymer is about 240°C. The temporal stability of non-centrosymmetric order in LBK films at elevated temperatures was followed by measurement of the second harmonic generated (SHG) light intensity. The SHG signal was found to be constant in LBK films heated at 95°C for 10 h.