TY - JOUR
T1 - Response function for the characterization of photo-induced anisotropy in azobenzene containing polymers
AU - Sajti, S.
AU - Kerekes, Á.
AU - Ramanujam, P.S.
AU - Lorincz, E.
PY - 2002
Y1 - 2002
N2 - A response function is derived for the description of photo-induced birefringence and dichroism in case of materials where the underlying process is photo-isomerization. Our result explains the usefulness of the theoretical formulae derived earlier by Kakichashvili for photo-anisotropic materials of another kind, which are widely used in polarization holographic models. The expression proposed by us depends on the exposure time for a given intensity, and describes the saturation of the anisotropy with time and intensity. The material constants introduced in our approach are expressed by proper microscopic quantities. The results are verified by numerical simulation and also by experiments.
AB - A response function is derived for the description of photo-induced birefringence and dichroism in case of materials where the underlying process is photo-isomerization. Our result explains the usefulness of the theoretical formulae derived earlier by Kakichashvili for photo-anisotropic materials of another kind, which are widely used in polarization holographic models. The expression proposed by us depends on the exposure time for a given intensity, and describes the saturation of the anisotropy with time and intensity. The material constants introduced in our approach are expressed by proper microscopic quantities. The results are verified by numerical simulation and also by experiments.
KW - 6-I optik
U2 - 10.1007/s00340-002-0975-8
DO - 10.1007/s00340-002-0975-8
M3 - Journal article
VL - 75
SP - 677
EP - 685
JO - Applied Physics B: Photophysics and Laser Chemistry
JF - Applied Physics B: Photophysics and Laser Chemistry
SN - 0721-7269
IS - 6-7
ER -