Title

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

Authors

Authors

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

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

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. (c) 2005 American Institute of Physics.

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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