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Proceedings Paper

New highly efficient two-photon fluorescent dyes
Author(s): Kevin D. Belfield; Alma R. Morales; Sheng Yao; Allyn Brice; Joel M. Hales; David J. Hagan; Eric W. Van Stryland
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Paper Abstract

Organic compounds that undergo strong nonlinear, multiphoton absorption have been gaining greater interest, mainly in the developing fields of multiphoton fluorescence imaging, optical data storage, 3-D microfabrication, and photodynamic therapy. Systematic studies have shown that conjugated organic molecules with large delocalized π electron systems show very large nonlinear optical effects. Two-photon absorbing chromophores have also been incorporated into dendrimers to increase two-photon absorptivity. A cooperative enhancement of two-photon absorption (2PA) has been observed, such as in the linkage of branched chromophores through a common amine group and chromophore-metal complexes. This enhancement may be related to extensive two-dimensional π-delocalization in these molecules. Herein, we describe the synthesis, structural characterization and photophysical study of a series of compounds (model, oligomer, and polymer) with symmetric molecular structure of the D-π-D motif and branched D-π-D dendrimeric structures based on substituted fluorene derivatives. Femtosecond 2PA cross sections were very large for some derivatives (over 10,000 GM) and often exhibited substantial solvent effects.

Paper Details

Date Published: 18 June 2004
PDF: 8 pages
Proc. SPIE 5351, Organic Photonic Materials and Devices VI, (18 June 2004); doi: 10.1117/12.529633
Show Author Affiliations
Kevin D. Belfield, College of Optics and Photonics/Univ. of Central Florida (United States)
Benemerita Univ. Autonoma de Puebla (Mexico)
Alma R. Morales, Benemerita Univ. Autonoma de Puebla (Mexico)
Sheng Yao, Univ. of Central Florida (United States)
Allyn Brice, Univ. of Central Florida (United States)
Joel M. Hales, College of Optics and Photonics/Univ. of Central Florida (United States)
David J. Hagan, College of Optics and Photonics/Univ. of Central Florida (United States)
Eric W. Van Stryland, College of Optics and Photonics/Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 5351:
Organic Photonic Materials and Devices VI
James G. Grote; Toshikuni Kaino, Editor(s)

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