Abstract
Two-photon absorption spectra for a range of bis(acceptor)-substituted bis(dibutoxythienyl)ethene and bis(N-hexylpyrrolyl)ethene chromophores have been recorded using Z-scan and white-light-continuum pump-probe techniques. All the chromophores studied show strong near-infrared two-photon absorption with cross sections in the range of 2400-5900 GM (1 GM = 1 × 10-50 cm4 s/photon) at photon wavelengths between 1.0 and 1.3 μm; cross sections as high as 10000 GM can be accessed close to the one-photon absorption edge. Quantum-chemical calculations reproduce the experimentally observed variations of the two-photon properties with the chemical structure.
| Original language | English |
|---|---|
| Pages (from-to) | 432-442 |
| Journal | Chemistry of Materials |
| Volume | 19 |
| Issue number | 3 |
| Online published | 13 Jan 2007 |
| DOIs | |
| Publication status | Published - 6 Feb 2007 |
| Externally published | Yes |
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