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|Type:||Artigo de periódico|
|Title:||Two-photon Absorption In Quadrupolar Bis(acceptor)-terminated Chromophores With Electron-rich Bis(heterocycle)vinylene Bridges|
Van Stryland E.W.
|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 cm 4 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. © 2007 American Chemical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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