TITLE

Highly sensitive photoalignment of liquid crystals through polarization preserved triplet energy transfer

AUTHOR(S)
Furumi, Seiichi; Ichimura, Kunihiro
PUB. DATE
July 2004
SOURCE
Applied Physics Letters;7/12/2004, Vol. 85 Issue 2, p224
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Highly sensitive photoalignment of liquid crystals (LCs) can be realized by the polarization preserved triplet energy transfer from doped sensitizers to cinnamate side chains of a photocrosslinkable polymer. Linearly polarized irradiation of sensitizer-doped polymer films with 365 nm light for selective excitation of the triplet photosensitizer gives rise to azimuthal photodichroism of cinnamates as a result of nanometric triplet energy transfer process preserving the polarization state of triplet-excited photosensitizer. This phenomenon is applicable to the surface-assisted orientational photocontrol of nematic LCs with high performance of extremely low exposure energies.
ACCESSION #
13719769

 

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