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Orientation of a photo-sensitive polymeric monolayer studied by second-harmonic generation

Title
Orientation of a photo-sensitive polymeric monolayer studied by second-harmonic generation
Authors
Park B.Kim H.S.Bae J.Y.Lee J.G.Woo H.S.Han S.H.Wu J.W.Kakimoto M.Takezoe H.
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
1998
Journal Title
Applied Physics B: Lasers and Optics
ISSN
0946-2171JCR Link
Citation
vol. 66, no. 4, pp. 445 - 451
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We determine the orientational distribution functions of azo-side-chain polymeric monolayers before and after the photo-irradiation by optical surface second-harmonic generation (SHG). The polymeric monolayer, composed of azo-dye-labeled polyamic acid (long alkyl) amine salt, is prepared by the Langmuir-Blodgett technique. Oblique incident surface SHG measurement from the monolayer provides the nonlinear-optical tensor components related to the orientational distribution functions of the azo-side-chain. The analysis of experimental results shows that the point symmetry of the azo-pendent unit in the monolayer changes from C∞ν to C1ν by the photo-isomerization process, with the azobenzene conformation retained as trans-isomer. © Springer-Verlag 1998.
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자연과학대학 > 물리학전공 > Journal papers
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