Three-photon absorption of a new series of halogenated fluorene derivatives

Ion Cohanoschi, Marisol García, Carlos Toro, Kevin D. Belfield, Florencio E. Hernández

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In this Letter, we report the characterization of the pure three-photon absorption and the measurement of the three-photon absorption cross-section (σ3) of a new series of halogenated fluorene derivatives. The three-photon absorption of these compounds corresponds to the S0 → S1 electronic transition. All four compounds presented here have potential application as photosensitizers in deep photodynamic therapy induced via high order nonlinear absorption. The measurements were done using a tunable OPG pumped by a 25 ps Nd-YAG laser, and performing transmittance vs. input intensity as well as open aperture Z-scan at different wavelengths to determine the highest value of σ3.

Original languageEnglish (US)
Pages (from-to)133-138
Number of pages6
JournalChemical Physics Letters
Issue number1-3
StatePublished - Oct 19 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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