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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 34 — Dec. 1, 2004
  • pp: 6339–6343

Nonlinear transmission and excited-state absorption in fluorene derivatives

Kevin D. Belfield, Mykhailo V. Bondar, Florencio E. Hernandez, Alma R. Morales, Olga V. Przhonska, and Katherine J. Schafer  »View Author Affiliations


Applied Optics, Vol. 43, Issue 34, pp. 6339-6343 (2004)
http://dx.doi.org/10.1364/AO.43.006339


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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

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(140.4480) Lasers and laser optics : Optical amplifiers
(160.3380) Materials : Laser materials
(160.4890) Materials : Organic materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials

History
Original Manuscript: May 19, 2004
Published: December 1, 2004

Citation
Kevin D. Belfield, Mykhailo V. Bondar, Florencio E. Hernandez, Alma R. Morales, Olga V. Przhonska, and Katherine J. Schafer, "Nonlinear transmission and excited-state absorption in fluorene derivatives," Appl. Opt. 43, 6339-6343 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-34-6339

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