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Novel nonlinear optical materials based on dihydropyridine organic chromophore deposited on mica substrate |
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| Authors: | T. Kolev B. Koleva J. Kasperczyk Ivan Kityk S. Tkaczyk M. Spiteler Ali H. Reshak W. Kuznik |
| Affiliation: | 1. Institute of Organic Chemistry, BAS, Acad. G. Bonchev Str. Build. 9, 1113, Sofia, Bulgaria 2. Faculty of Chemistry, Plovdiv University, 25, Tzar. Assen, Str., 4000, Plovdiv, Bulgaria 3. Faculty of Chemistry, Sofia University, 1. J. Bourchier, Blvd., 1164, Sofia, Bulgaria 4. Institute of Physics, J. Dlugosz University, Al. Armii Krajowej 13/15, 42200, Czestochowa, Poland 5. Faculty of Chemistry, Silesian University of Technology, ul. M. Strzody 9, 44100, Gliwice, Poland 6. Institut für Umweltforschung, Universit?t Dortmund, Otto-Hahn-Strasse 6, 44221, Dortmund, Germany 7. Institute of Physical Biology, South Bohemia University, 37333, Nove Hrady, Czech Republic 8. Institute of System Biology and Ecology, Academy of Sciences, 37333, Nove Hrady, Czech Republic |
| Abstract: | We have synthesized novel composites based on a 1-methyl-4-[2-(3-methoxy-4-oxocyclohexadienyliden)ethyliden]-1,4-dihydropyridine chromophore incorporated into a polymer PMMA host (weight content of 7.5%) deposited on the mica substrate. In the result of simultaneous application of external dc-electric field and thermal heating we have measured values of second order optical effect of about 122 pm/V at 1,064 nm fundamental laser wavelength. This effect show very weak reversibility after the dc-field switching off. Optical properties of the embedded compound were elucidated by means of IR–LD spectroscopy of oriented colloids in nematic host. UV-spectroscopy, 1H- and 13C-NMR methods were also used. Quantum chemical calculations have been carried out in order to describe electronic structure and optical properties. |
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