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Proceedings Paper

Two-photon absorption spectra of luminescent conducting polymers measured over wide spectral range
Author(s): Ron K. Meyer; Martin Liess; Robert E. Benner; Werner Gellermann; Z. Valy Vardeny; Masanori Ozaki; Katsumi Yoshino; Yi Wei Ding; Thomas J. Barton
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Paper Abstract

We report the two-photon absorption (TPA) spectra of poly(2,5-dibutoxy-p-phenylene acetylene) (PPA-DBO), poly(2,5-dioctyloxy-p-phenylene vinylene) (PPV-DOO), and poly(3-hexylthiophene) in the spectral range extending from 576 nm to 846 nm. Using the Z-scan technique on the polymers in solution, we measured a strong two-photon allowed transition in all three materials which we attribute to the mAg essential state. In the case of PPA-DBO and PPV-DOO, TPA peaks were coincident with dispersion in the nonlinear refractive indices as detected by reduced aperture Z scan. In all three polymers this peak occurs at approximately 1.3 the bandgap energy. The excitonic nature of the excited electronic states in PPA-DBO is indicated by the lack of a TPA band at or near the 1Bu exciton position. Saturation was observed in the nonlinear index of refraction near spectral peaks, as well as an apparent reverse Kramers- Kronig effect.

Paper Details

Date Published: 1 December 1997
PDF: 10 pages
Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); doi: 10.1117/12.279279
Show Author Affiliations
Ron K. Meyer, Univ. of Utah (United States)
Martin Liess, Univ. of Utah (United States)
Robert E. Benner, Univ. of Utah (United States)
Werner Gellermann, Univ. of Utah (United States)
Z. Valy Vardeny, Univ. of Utah (United States)
Masanori Ozaki, Osaka Univ. (Japan)
Katsumi Yoshino, Osaka Univ. (Japan)
Yi Wei Ding, Iowa State Univ. (United States)
Thomas J. Barton, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 3145:
Optical Probes of Conjugated Polymers
Z. Valy Vardeny; Lewis J. Rothberg, Editor(s)

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