Third-order nonlinear optical properties of poly(p-phenylenevinylene) derivatives substituted at vinylene position

Anna Samoc; Marek Samoc; Barry Luther-Davies; Heike Liebegott; Regina Stockmann; Hans-Heinrich Hoerhold

doi:10.1117/12.328178

16 October 1998 Third-order nonlinear optical properties of poly(p-phenylenevinylene) derivatives substituted at vinylene position

Anna Samoc, Marek Samoc, Barry Luther-Davies, Heike Liebegott, Regina Stockmann, Hans-Heinrich Hoerhold

Author Affiliations +

Proceedings Volume 3473, Third-Order Nonlinear Optical Materials; (1998) https://doi.org/10.1117/12.328178
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Anna Samoc, Marek Samoc, Barry Luther-Davies, Heike Liebegott, Regina Stockmann, and Hans-Heinrich Hoerhold "Third-order nonlinear optical properties of poly(p-phenylenevinylene) derivatives substituted at vinylene position", Proc. SPIE 3473, Third-Order Nonlinear Optical Materials, (16 October 1998); https://doi.org/10.1117/12.328178

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