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Thermal-pulse investigation of poled nonlinear optical polymers
|Lewiner, J. ; IEEE Dielectrics and Electrical Insulation Society:|
8th International Symposium on Electrets 1994. Proceedings : 7 - 9 September 1994, ESPCI Paris, France
Piscataway, NJ: IEEE, 1994
|International Symposium on Electrets (ISE) <8, 1994, Paris>|
|Fraunhofer HHI ()|
| dielectric polarisation; electrets; electric fields; nonlinear optics; optical polymers; polymer films; poled nonlinear optical polymer films; electric-field profiles; polarization profiles; thermal-pulse-technique; substrate effect; adhered nlo chromophores|
Poled nonlinear optical (NLO) polymer films are usually supported by substrates. This leaves two possibilities for investigating polarization and electric-field profiles in such samples with the thermal-pulse- technique: Thermal-pulse generation in the front electrode on the film or in the rear electrode between film and substrate. The influence of the substrate on the amplitude and on the long-time behavior of the thermal-pulse signal is theoretically treated. Experiments were performed on a poled double-layer sample consisting of a polymer film with NLO chromophores adhered to a similar polymer without chromophores, the latter film adhered to the substrate. The results demonstrate the validity of the proposed experimental approach.