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Science 10 November 1995:
Vol. 270. no. 5238, pp. 966 - 969
DOI: 10.1126/science.270.5238.966
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Reports

Supramolecular Second-Order Nonlinearity of Polymers with Orientationally Correlated Chromophores

Martti Kauranen,  Thierry Verbiest,  Carlo Boutton,  M. N. Teerenstra,  Koen Clays,  A. J. Schouten,  R. J. M. Nolte,  André Persoons (1)

Nonlinear optical chromophores can be organized as orientationally correlated side groups of polymers with a rigid backbone. In such an organization, each chromophore contributes coherently to the second-order nonlinear response of the polymer structure. A first hyperpolarizability exceeding 5000 times 10 electrostatic units was measured for a poly(isocyanide) structure containing 100 chromophores by means of hyper-Rayleigh scattering. Electric field-induced second-harmonic generation measurements confirmed that the product of the permanent dipole moment and the first hyperpolarizability was enhanced for the polymer structure. These results provide guidelines for future efforts to optimize supramolecular structures for applications in second-order nonlinear optics.


M. Kauranen, T. Verbiest, C. Boutton, K. Clays, A. Persoons, Laboratory of Chemical and Biological Dynamics and Center for Research on Molecular Electronics and Photonics, University of Leuven, B-3001 Heverlee, Belgium.
M. N. Teerenstra and A. J. Schouten, Laboratory of Polymer Science, University of Groningen, 9747 AG Groningen, Netherlands.
R. J. M. Nolte, Department of Organic Chemistry, University of Nijmegen, 6525 ED Nijmegen, Netherlands.
(1) To whom correspondence should be addressed.


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