Mega three-photon absorption cross-section enhancement in pseudoisocyanine J-aggregates
Abbreviated Journal Title
J. Chem. Phys.
FLUORESCENCE; EXCITON; Physics, Atomic, Molecular & Chemical
Herein we report an extraordinary three-photon absorption cross-section (sigma(3)(')) enhancement in J-aggregates supramolecular systems. The much higher value of sigma(3)(') in PIC J-aggregate (2.5x10(-71) cm(6) s(2) ph(-2)) compared to typical values obtained in organic molecules (10(-80) cm(6) s(2) 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. (c) 2005 American Institute of Physics.
Journal of Chemical Physics
"Mega three-photon absorption cross-section enhancement in pseudoisocyanine J-aggregates" (2005). Faculty Bibliography 2000s. 5075.