Resonant nonlinearities in an organic material: Irradiance dependence

R. Rangel-Rojo, H. Matsuda, H. Kasai, H. Nakanishi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We present experimental data for the irradiance dependence of the optical nonlinearity of a suspension of vanadyl-phthalocyanine nano-crystals in cyclohexane at different wavelengths across resonance. The refractive and absorptive contributions to the nonlinearity were resolved using the z-scan technique with a tunable picosecond laser source. A three-level model is used to describe the observed dependence of the nonlinearity with irradiance, which is considered as arising solely from excited-state absorption. A fit to the experimental data is made, allowing the extraction of molecular parameters which are of interest for a full characterisation of the nonlinearity.

Original languageEnglish
Pages (from-to)379-384
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics
Issue number1-4
Publication statusPublished - 2000
Externally publishedYes


  • Excited-state absorption
  • Nano-crystals
  • Saturation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Condensed Matter Physics


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