Ordering of azobenzenes by two-photon isomerization.

@article{Ishitobi2006OrderingOA,
  title={Ordering of azobenzenes by two-photon isomerization.},
  author={Hidekazu Ishitobi and Zouheir Sekkat and Satoshi Kawata},
  journal={The Journal of chemical physics},
  year={2006},
  volume={125 16},
  pages={164718}
}
We report on light induced orientation by two-photon isomerization of azobenzenes in films of polymer. The dynamics of isomerization and orientation by one-photon absorption and two-photon absorption (TPA) are similar, and TPA creates a degree of molecular orientation which is comparable to that achieved by single-photon isomerization, in agreement with the theoretical predictions of two-photon isomeric orientation.