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Ultrafast induced excited state absorption in organically doped xerogels

Abstract : Vanadyl-phthalocyanines have been trapped in different silica-based xerogel matrices. Nonlinear `reverse saturable absorption' behavior has been observed for femtosecond and nanosecond pulse excitation at 620 nm. Nanosecond experiments could be fitted using a classical 3-energy-level model. However, the time scales are such that the behavior observed with femtosecond pulses cannot be correctly interpreted with the same model.
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Marc Brunel, Benjamin Campagne, Michael Canva, Alain Brun, Frédéric Chaput, et al.. Ultrafast induced excited state absorption in organically doped xerogels. Chemical Physics, Elsevier, 1999, 246, pp.477-481. ⟨10.1016/S0301-0104(99)00168-8⟩. ⟨hal-00665661⟩

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