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Proceedings Paper

High density bis-azo copolymers: influence of dipole-dipole interaction on electrical poling processes and realization of a Fabry-Perot modulator
Author(s): D. Apitz; R. P. Bertram; N. Benter; W. Hieringer; J. W. Andreasen; M. M. Nielsen; P. M. Johansen; K. Buse
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Paper Abstract

The chromophore orientation distribution in photoaddressable bis-azo copolymer thin films is investigated as a function of the poling temperature and the chromophore concentration. The first, second, and third order parameters are deduced from the linear electro-optic coefficients and the linear dichroism by free-beam interferometry and angle-resolved spectroscopy, respectively. Absorption spectra obtained by density-functional calculations are compared with the experimentally observed ones and support the picture of differently aligned bis-azo dye molecules in a trans,trans-configuration. The various kinds of ordering in samples poled at different temperatures is confirmed by complementary wide-angle X-ray scattering. Furthermore, we show that a higher thermal stability for applications can be reached by fractionating the polymer, and how such a material can be successfully employed to build a large-area Fabry-Perot-Modulator using the electro-optic effect.

Paper Details

Date Published: 18 August 2005
PDF: 6 pages
Proc. SPIE 5935, Linear and Nonlinear Optics of Organic Materials V, 59350T (18 August 2005); doi: 10.1117/12.623704
Show Author Affiliations
D. Apitz, Risø National Lab. (Denmark)
Univ. of Bonn (Germany)
R. P. Bertram, Univ. of Bonn (Germany)
N. Benter, Univ. of Bonn (Germany)
W. Hieringer, Friedrich-Alexander-Univ. Erlangen-Nuremberg (Germany)
J. W. Andreasen, Risø National Lab. (Denmark)
M. M. Nielsen, Risø National Lab. (Denmark)
P. M. Johansen, Svendborg International Maritime Academy (Denmark)
K. Buse, Univ. of Bonn (Germany)

Published in SPIE Proceedings Vol. 5935:
Linear and Nonlinear Optics of Organic Materials V
Manfred Eich, Editor(s)

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