Mega three-photon absorption cross-section enhancement in pseudoisocyanine J-aggregates

Ion Cohanoschi, Amel Barbot, Kevin D. Belfield, Sheng Yao, Florencio E. Hernandez

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Herein we report an extraordinary three-photon absorption cross-section (σ3′) enhancement in J-aggregates supramolecular systems. The much higher value of σ3′ in PIC J-aggregate (2.5× 10-71 cm6 s2 ph-2) compared to typical values obtained in organic molecules (10-80 cm6 s2 ph-2) is attributed to the strong molecular transition dipole moment coupling in the supramolecular assembly. Three-photon absorption of PIC J-aggregates and monomer aqueous solutions were measured using the well known open aperture Z -scan technique pumping with a 25 ps pulse laser-OPG system at 1720 nm. This novel result opens new expectations for applications of supramolecular systems in bioimaging and medicine.

Original languageEnglish (US)
Article number231104
JournalJournal of Chemical Physics
Issue number23
StatePublished - 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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