Title

Nonlinear transmission and excited-state absorption in fluorene derivatives

Authors

Authors

K. D. Belfield; M. V. Bondar; F. E. Hernandez; A. R. Morales; O. V. Przhonska;K. J. Schafer

Comments

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Abbreviated Journal Title

Appl. Optics

Keywords

Optics

Abstract

The nonlinear transmission and the excited-state absorption spectra of three fluorene derivatives exhibiting large two-photon absorptivity were measured by the third harmonic of a picosecond Nd:YAG laser. We analyzed their capability for exhibiting stimulated emission in polar solvents and found that asymmetrical fluorene compounds with a diphenylamino substituent exhibited large Stokes shifts (similar to8000 cm(-1)), high quantum yields (similar to0.9-1.0), and no optical gain over their entire fluorescence spectral region. In contrast, a symmetrical fluorene derivative with vinylphenylbenzothiazole substituents in positions 2 and 7 underwent lasing tinder one-photon excitation by use of picosecond pulsed irradiation. (C) 2004 Optical Society of America.

Journal Title

Applied Optics

Volume

43

Issue/Number

34

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

6339

Last Page

6343

WOS Identifier

WOS:000225342900015

ISSN

1559-128X

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