Photorefractive effect of a novel conjugate polymer containing transition metal complex
Department of Physics, Tonghua Teacher College, Tonghua 134002, Jilin, P.R. China
Revised: 7 July 2001
Published online: 15 April 2002
The photorefractive effect (PR) of a novels alternating polymer having 2,2'-bipyridyl in the polymer backbone and their ruthenium complexes has been investigated. The ruthenium complex was used as the charge generator, the alternating polymer backbone as the charge transporting channel and second-order nonlinear (NLO) optical chromophore. The photorefractive properties were demonstrated by two-beam coupling (2BC), degenerated four-wave mixing (DFWM) and field-induced orientation birefringence at wavelength of 532 nm. This polymer shows a enhanced photorefractive effect due to the efficient photoinduced metal-to-ligand charge transfer (MLCT) inside the ruthenium complex. A net optical gain of about 22 cm-1 and the diffraction efficiency about 10% were obtained at the external electric field of 30 V/μm.
PACS: 71.20.Rv – Polymers and organic compounds
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002