Photopolymers for non-linear optics: Design and synthesis of a polymer containing styrene-terminated tolane chromophores and its stabilization in an oriented configuration by photocrosslinking
✍ Scribed by Adelheid Godt; Jean M. J. Fréchet; Jody E. Beecher; Craig S. Willand
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 777 KB
- Volume
- 196
- Category
- Article
- ISSN
- 1022-1352
No coin nor oath required. For personal study only.
✦ Synopsis
A new photocrosslinkable polymer designed for application in second harmonic generation has been prepared and tested for frequency doubling of IR lasers. The polymer is based on a colorless polyurethane with pendant tolane nonlinear optical chromophores that carry a polymerizable styrene moiety at their extremities. Photocrosslinking is achieved by irradiation of films containing a small amount of a bleachable radical photoinitiator. The effect of photoinduced radical crosslinking on the mobility of the chromophores has been studied by recording the intensity of the frequency doubled light, generated by a poled sample, with increasing temperature. As expected, photocrosslinking leads to NLO materials with highly stable chromophore orientation.