Abstract
Second-order nonlinear optical susceptibilities of a series of newly synthesized liquid crystalline polymers and corresponding monomers were measured by using second-harmonic generation. A substituted stilbene moiety was selected as the main conjugated π-electronic structure, and systematic modifications were made at the site of the donor and in the conjugation path to compare the roles of various donors and charge-transferring linkages in the second-harmonic-generation process. The β values extracted from the measurements made on solutions and on thin films yielded similar values for the monomers and the corresponding polymers. The variations in β values are discussed in terms of molecular structural properties, charge-transferring power of the donors, and dispersion effect.
© 1992 Optical Society of America
Full Article | PDF ArticleMore Like This
M. Stähelin, B. Zysset, M. Ahlheim, S. R. Marder, P. V. Bedworth, C. Runser, M. Barzoukas, and A. Fort
J. Opt. Soc. Am. B 13(11) 2401-2407 (1996)
K. D. Singer, J. E. Sohn, L. A. King, H. M. Gordon, H. E. Katz, and C. W. Dirk
J. Opt. Soc. Am. B 6(7) 1339-1350 (1989)
D. Morichère, P.-A. Chollet, W. Fleming, M. Jurich, Barton A. Smith, and J. D. Swalen
J. Opt. Soc. Am. B 10(10) 1894-1900 (1993)