Rutloh, M.; Zebger, I.; Hoffmann, U.; Stumpe, J.; Siesler, H.w.:
Photo-induced orientation effects parallel and perpendicular to the polarization vector of the incident laser light observed in the same azobenzene-containing LC polymer film.
1998
In: Polymer Preprints (American Chemical Society, Division of Polymer Chemistry), Jg. 39 (1998), Heft 2, S. 324 - 325
Artikel/Aufsatz in Zeitschrift1998Chemie
Titel:
Photo-induced orientation effects parallel and perpendicular to the polarization vector of the incident laser light observed in the same azobenzene-containing LC polymer film.
Autor(in):
Rutloh, M.; Zebger, I.; Hoffmann, U.LSF; Stumpe, J.; Siesler, H.w.LSF
Erscheinungsjahr
1998
Erschienen in:
Titel:
Polymer Preprints (American Chemical Society, Division of Polymer Chemistry)
in:
Jg. 39 (1998), Heft 2, S. 324 - 325
ISSN:

Abstract:

A very high spectroscopic dichroism of about 0.8 and a birefringence of about 0.3 are achieved when liq.-cryst. polyester contg. azobenzene side groups is irradiated with 488-nm light perpendicular to the polarization vector or by 633-nm light parallel to the polarization vector. The photoorientation by 488-nm light is characterized by the repetition of angular-dependent excitation causing angular-selective photoisomerization cycles and rotational diffusion. Using 633-nm light the polarization dependence of the second irradn. step which transferred the steady state further to the E isomer results in an efficient alignment of the mesogenic side groups of the liq.-cryst. polymer.