Title

Nonlinear Transmission And Excited-State Absorption In Fluorene Derivatives

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 (∼8000 cm-1), high quantum yields (∼0.9-1.0), 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 under one-photon excitation by use of picosecond pulsed irradiation. © 2004 Optical Society of America.

Publication Date

12-1-2004

Publication Title

Applied Optics

Volume

43

Issue

34

Number of Pages

6339-6343

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.43.006339

Socpus ID

10644241748 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/10644241748

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