Highly polar chromophores in poled polymer films characterised by second harmonic generation

Evidence for exceptionally high dipole moments in a series of nonlinear optical chromophores doped into poly(methyl methacrylate) films has been found. The strength of the poling field/dipole interaction is measured directly from incidence angle dependence of the second harmonic (SH) intensity gener...

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Bibliographic Details
Published in:Chemical physics letters 1997-04, Vol.268 (1), p.36-42
Main Authors: Cross, G.H., Healy, D., Szablewski, M., Bloor, D., Malagoli, M., Kogej, T., Beljonne, D., Brédas, J.-L.
Format: Article
Language:English
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Summary:Evidence for exceptionally high dipole moments in a series of nonlinear optical chromophores doped into poly(methyl methacrylate) films has been found. The strength of the poling field/dipole interaction is measured directly from incidence angle dependence of the second harmonic (SH) intensity generated from corona poled films. Values of the dipolar orientation parameter, , greater than 0.5 can be achieved for externally applied fields of only MV m −1. Quantum chemical calculations of the evolution of the dipole moments of the compounds versus local reaction field support the conclusion that extremely high dipole moments characterise these molecules.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(97)00160-7