Determination of the orientational order parameters <P*2>, <P*4> in a polysilane LB film via polarization-dependent THG

Dieter Neher; Silvia Mittler-Neher; Myoungsik Cha; George I. Stegeman; F. W. Embs; Gerhard Wegner; Robert D. Miller; C. Grant Willson

doi:10.1117/12.50730

1 December 1991 Determination of the orientational order parameters 2>, 4> in a polysilane LB film via polarization-dependent THG

Dieter Neher, Silvia Mittler-Neher, Myoungsik Cha, George I. Stegeman, F. W. Embs, Gerhard Wegner, Robert D. Miller, C. Grant Willson

Author Affiliations +

Proceedings Volume 1560, Nonlinear Optical Properties of Organic Materials IV; (1991) https://doi.org/10.1117/12.50730
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

We demonstrate resonant third harmonic generation as a powerful tool for analyzing the quasi 2-D molecular orientational order in a Langmuir-Blodgett film of poly(bis-m- butoxyphenylsilane). By recording Maker-fringes at different angles between the polarization of the fundamental beam and the dipping direction, we were able to determine the order parameters *2> and *4> simultaneously. We found *2> equals 0.466 +/- 0.030 and *4> equal to -0.12 +/- 0.10.

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Dieter Neher, Silvia Mittler-Neher, Myoungsik Cha, George I. Stegeman, F. W. Embs, Gerhard Wegner, Robert D. Miller, and C. Grant Willson "Determination of the orientational order parameters 2>, 4> in a polysilane LB film via polarization-dependent THG", Proc. SPIE 1560, Nonlinear Optical Properties of Organic Materials IV, (1 December 1991); https://doi.org/10.1117/12.50730

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