Nonlinear refractive index and three-photon absorption coefficient of poly(9,9-dioctylfluorence)

J. I. Jang, S. Mani, J. B. Ketterson, P. Lovera, G. Redmond

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10 Scopus citations


We investigate the optical Kerr effect and third harmonic generation (THG) arising from χ(3) of poly(9,9-dioctylfluorence), which is an emerging organic π -conjugated polymer from the perspective of diverse optoelectronic applications. The measured nonlinear refractive index, obtained with closed-aperture Z-scan, is n2 = (2.04±0.10) × 10-12 esu at λ=1540 nm. Open-aperture Z-scan yields the three-photon absorption coefficient of γ= (1.88±0.26) × 10-3 cm3 / GW2 at λ=1064 nm, arising from χ(5) response. The wavelength-dependent THG indicates that this semiconducting polymer can be a potentially useful polymer system for nonlinear-optics applications involving high-order optical processes in the mid-IR range.

Original languageEnglish (US)
Article number221906
JournalApplied Physics Letters
Issue number22
StatePublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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