Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5187898 | Polymer | 2008 | 5 Pages |
Abstract
We carried out experiments of induced birefringence via two-photon absorption in spin-coated films of the conjugated polymer poly[2-[ethyl-[4-(4-nitro-phenylazo)-phenyl]-amino]-ethane (3-thienyl)ethanoate], PAzT, at 680 and 775Â nm. This process allows recording in the bulk because of the spatial confinement of the birefringence provided by the two-photon absorption. The induced birefringence is associated with molecular reorientation caused by the two-photon induced isomerization of the azochromophores attached to the polymer backbone. In addition, the two-photon absorption spectrum of PAzT was measured to help selecting the excitation wavelength for two-photon absorption induced birefringence.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
D.S. Correa, M.R. Cardoso, V.C. Gonçalves, D.T. Balogh, L. De Boni, C.R. Mendonça,