Authors

I. Cohanoschi; A. Barbot; K. D. Belfield; S. Yao;F. E. Hernandez

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Abbreviated Journal Title

J. Chem. Phys.

Keywords

FLUORESCENCE; EXCITON; Physics, Atomic, Molecular & Chemical

Abstract

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.

Journal Title

Journal of Chemical Physics

Volume

123

Issue/Number

23

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000234145900004

ISSN

0021-9606

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