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Proceedings Paper

Phase measurement of second-harmonic generation in Langmuir-Blodgett films
Author(s): Hiromi Kimura-Suda; Tatsuo Wada; Wei Liang; Hiroo Nakahara; Hiroyuki Sasabe
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Paper Abstract

The Langmuir-Blodgett (LB) films of tolan derivatives were studied by a new second-harmonic generation (SHG) phase measurement in terms of the directional sense of the net dipole moment and molecular structures. 4-Docosylamino-tolan derivatives with 4'-nitro group (ANT-22) or 4'-dicyano-vinyl (DCNANT-22) group were transferred by horizontal lifting. In rotational Maker-fringe, the envelope of ANT-22 LB film shows an in-plane polar anisotropy, and that of DCNANT-22 LB film shows a polar anisotropy perpendicular to the substrate. Nonlinear optical chromophore in ANT-22 is bound to lie almost flat upon the plane of the substrate, while DCNANT-22 molecules in thick multilayers tend to align perpendicular to the substrate. It was found by SHG phase measurement that the directional sense of the net dipole moment of ANT-22 was perpendicular to the compression direction.

Paper Details

Date Published: 29 October 1998
PDF: 7 pages
Proc. SPIE 3474, Second-Order Organic Nonlinear Optics, (29 October 1998); doi: 10.1117/12.328583
Show Author Affiliations
Hiromi Kimura-Suda, Japan Science and Technology Corp. (United States)
Tatsuo Wada, Japan Science and Technology Corp. and RIKEN-The Institute of Physical and Chemical Resear (Japan)
Wei Liang, Saitama Univ. (Japan)
Hiroo Nakahara, Saitama Univ. (Japan)
Hiroyuki Sasabe, Japan Science and Technology Corp. and RIKEN-The Institute of Physical and Chemical Resear (Japan)


Published in SPIE Proceedings Vol. 3474:
Second-Order Organic Nonlinear Optics
Manfred Eich, Editor(s)

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