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Article Dans Une Revue Journal of Nonlinear Optical Physics and Materials Année : 2005

Dendritic fluorene oligomers for nonlinear absorption in the visible range

Résumé

We report here the nonlinear absorption properties of dendritic molecules of oligofluorenes. Measurements were performed in chloroform between 450 and 650 nm for nanosecond time duration pulses. The nonlinear absorption is attributed to a three-photon absorption process involving first a two-photon absorption (TPA) step followed by an excited state absorption (ESA) process. The corresponding three-photon absorption coefficient α3 presents at resonance high values (α3 > 10000 cm3/GW2 for 2G1 the first dendrimer generation bearing a bifluorene at a concentration of 50 g/L). These values are strongly enhanced with respect to those obtained in the same conditions for analog linear oligofluorenes.
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hal-01321144 , version 1 (25-05-2016)

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Cyril Barsu, Chantal Andraud, Nadia Amari, Sylvie Spagnoli, Patrice L. Baldeck. Dendritic fluorene oligomers for nonlinear absorption in the visible range. Journal of Nonlinear Optical Physics and Materials, 2005, 14 (03), pp.311-318. ⟨10.1142/S021886350500275X⟩. ⟨hal-01321144⟩
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