Nonlinear transmission and excited-state absorption in fluorene derivatives

    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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