Abstract
We compare the third-order nonlinear optical properties of several π-conjugated polymers: poly(p-phenylenevinylene) (PPV), which is a `rigid rod' type of a molecule, substituted poly(p-phenylenevinylenes) representing the `hairy rod' structures, a `ladder' type poly(p-phenylene) polymer and a novel conjugated polymer: polyindenofluorene having a `picket fence' structure. The real and imaginary parts of the nonlinear refractive index and two-photon loss merit factors at 800 nm have been derived from the femtosecond Z-scan measurements of the polymers in solutions. The data on the modulus of nonlinear refractive index |n 2| have been obtained from degenerate four-wave mixing in films of the neat polymers and the composites of PPV.
| Original language | English |
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| Pages (from-to) | 183-196 |
| Number of pages | 14 |
| Journal | Molecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics |
| Volume | 20 |
| Issue number | 1 |
| Publication status | Published - 1999 |
| Event | Proceedings of the 1997 International Symposium on Organic Polymeric Materials for Optical Communication and Information Storage - Taejon, S Kor Duration: 30 Oct 1997 → 1 Nov 1997 |