Thermally crosslinkable second-order nonlinear optical polymer networks: high stability, good transparency, and large second-order nonlinear optical effects†
Abstract
A new in situ thermal crosslinking approach was proposed to design second-order nonlinear optical polymer networks through a simple synthetic route, with the combination of the “isolate chromophore” concept. After in situ poling and thermal crosslinking, these networks demonstrated excellent second-order nonlinear optical (NLO) coefficients (d33 value) with good NLO thermal stability (T80%), in which, T3MA/TS2N3 had a high d33 value of 222 pm V−1 and a T80% of 99.7 °C, reaching a high level in the polymers containing simple azo chromophore moieties.