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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 7, Iss. 6 — Jun. 1, 1990
  • pp: 902–907

Determination of molecular orientation in molecular monolayers by second-harmonic generation

T. G. Zhang, C. H. Zhang, and G. K. Wong  »View Author Affiliations

JOSA B, Vol. 7, Issue 6, pp. 902-907 (1990)

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A detailed comparison is given of several theoretical expressions commonly used in the determination of the molecular orientation in monolayers by reflection second-harmonic-generation measurements. The experimental data obtained from the Langmuir films of a hemicyanine dye are used to demonstrate that the deduced molecular-orientation angle depends sensitively on the linear dielectric constants of the monolayer. It is also pointed out that an unambiguous determination of the nonlinear susceptibilities of a monolayer by reflection second-harmonic generation requires measurements that use at least three different polarization combinations.

© 1990 Optical Society of America

Original Manuscript: September 26, 1989
Manuscript Accepted: January 19, 1990
Published: June 1, 1990

T. G. Zhang, C. H. Zhang, and G. K. Wong, "Determination of molecular orientation in molecular monolayers by second-harmonic generation," J. Opt. Soc. Am. B 7, 902-907 (1990)

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