TY - JOUR
T1 - Theoretical model of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters
AU - Pedersen, Thomas Garm
AU - Johansen, Per Michael
AU - Holme, N.C.R.
AU - Ramanujam, P.S.
AU - Hvilsted, Søren
PY - 1998
Y1 - 1998
N2 - A theoretical framework for the temporal behavior of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters is constructed. The domain structure of the material is taken into account and inter molecular interactions are included through a mean-field description. Photoinduced trans cis isomerization is taken as the dominating source of chromophore reorientation events, and it is demonstrated how this mechanism in conjunction with the multidomain picture is able to account for the long-term stability of the anisotropy. The photoinduced birefringence is calculated by means of a truncated basis method, and in addition the photostationary solution is obtained. Comparison between theory and experiment shows excellent agreement in the entire range of intensities used experimentally.
AB - A theoretical framework for the temporal behavior of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters is constructed. The domain structure of the material is taken into account and inter molecular interactions are included through a mean-field description. Photoinduced trans cis isomerization is taken as the dominating source of chromophore reorientation events, and it is demonstrated how this mechanism in conjunction with the multidomain picture is able to account for the long-term stability of the anisotropy. The photoinduced birefringence is calculated by means of a truncated basis method, and in addition the photostationary solution is obtained. Comparison between theory and experiment shows excellent agreement in the entire range of intensities used experimentally.
KW - Optik og sensorsystemer
U2 - 10.1364/JOSAB.15.001120
DO - 10.1364/JOSAB.15.001120
M3 - Journal article
SN - 0740-3224
VL - 15
SP - 1120
EP - 1129
JO - Optical Society of America. Journal B: Optical Physics
JF - Optical Society of America. Journal B: Optical Physics
IS - 3
ER -