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Optics Letters

Optics Letters


  • Vol. 23, Iss. 16 — Aug. 15, 1998
  • pp: 1295–1297

Saturable absorption in poly(indenofluorene): a picket-fence polymer

Marek Samoc, Anna Samoc, Barry Luther-Davies, Helge Reisch, and Ullrich Scherf  »View Author Affiliations

Optics Letters, Vol. 23, Issue 16, pp. 1295-1297 (1998)

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Poly(indenofluorene) shows a strong degenerate four-wave mixing (DFWM) response when it is excited with 100-fs pulses at 800 nm. The DFWM signal scales with the 1.5 power of the input intensity, which we interpret as being due to absorption saturation phenomena. The saturation was studied by open-aperture Z scan in dilute solutions of poly(indenofluorene) in chloroform. The changes in the absorption coefficient α are described by the formula α = α0/[1 + (I/Isat)1/2], where Isat is the saturation intensity, which is found to be of the order of 100>MW/cm2.

© 1998 Optical Society of America

OCIS Codes
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter

Marek Samoc, Anna Samoc, Barry Luther-Davies, Helge Reisch, and Ullrich Scherf, "Saturable absorption in poly(indenofluorene): a picket-fence polymer," Opt. Lett. 23, 1295-1297 (1998)

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