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Proceedings Paper

Third-order nonlinear optical properties of poly(p-phenylenevinylene) derivatives substituted at vinylene position
Author(s): Anna Samoc; Marek Samoc; Barry Luther-Davies; Heike Liebegott; Regina Stockmann; Hans-Heinrich Hoerhold
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Paper Abstract

The techniques of closed and open aperture Z-scan as well as that of phase-matched and non-phase-matched degenerate four- wave mixing (DFWM) were used to investigate nonlinear optical properties of two poly(p-phenylenevinylenes) substituted with the phenoxyphenyl and fluorophenyl groups at the vinylene position. The polymers studied were poly[1,4-phenylene-1,2- di(4-phenoxyphenyl)vinylene] (DPOP-PPV) and poly[4,4'-biphenyl-diyl-1,2-di(4- fluorophenyl)vinylene] (DFP-PDPV). Spectroscopic studies showed a blue shift of absorption spectra of both polymers in comparison to that of poly(p-phenylenevinylene) (PPV). Z-scan experiments for solutions of the polymers in 1,4-dioxane and DFWM experiments for thin films of the polymers were carried out at 800 nm with amplified 100 femtosecond pulses. The results of both techniques are in good agreement, indicating that the nonlinear refractive index n2 is on the order of 10-14 cm2/W for the substituted polymers. The sign of the real and imaginary parts of n2 is positive. The polymers possess relatively low values of two-photon absorption merit factors at 800 nm. The nonlinear properties of the substituted polymers were compared to the results obtained on unsubstituted PPV films.

Paper Details

Date Published: 16 October 1998
PDF: 12 pages
Proc. SPIE 3473, Third-Order Nonlinear Optical Materials, (16 October 1998); doi: 10.1117/12.328178
Show Author Affiliations
Anna Samoc, Australian National Univ. (Australia)
Marek Samoc, Australian National Univ. (Australia)
Barry Luther-Davies, Australian National Univ. (Australia)
Heike Liebegott, Friedrich-Schiller-Univ. Jena (Germany)
Regina Stockmann, Friedrich-Schiller-Univ. Jena (Germany)
Hans-Heinrich Hoerhold, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 3473:
Third-Order Nonlinear Optical Materials
Mark G. Kuzyk, Editor(s)

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