Thermally crosslinkable second-order nonlinear optical polymer networks: high stability, good transparency, and large second-order nonlinear optical effects

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 (d(33) value) with good NLO thermal stability (T-80%), in which, T3MA/TS2N(3) had a high d(33) value of 222 pm V-1 and a T-80% of 99.7 degrees C, reaching a high level in the polymers containing simple azo chromophore moieties.

Automated summary

This study proposes a new approach to design second-order nonlinear optical polymer networks through in situ thermal crosslinking. The networks exhibit excellent optical performance and stability after in situ poling and thermal crosslinking.