Saturation in the near-resonance nonlinearities in a triazole-quinone derivative

R. Rangel-Rojo, L. Stranges, A. K. Kar, M. A. Mendez-Rojas, W. H. Watson

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24 Citations (Scopus)


In this work, we present a study of the third-order nonlinearities of a novel organic material, a derivative of the molecule 2-amino-1,2,3 triazole-quinone. The absorptive and refractive contributions to the nonlinearity were resolved using the z-scan technique with a 88 ps pulse source at 532 nm. The open aperture z-scan results show a nonlinearity arising from a combination of induced and saturable absorption, and the closed aperture the signature of a negative n2. The irradiance dependence of the closed aperture signal reveals a saturating nonlinearity which even decreases at high irradiances. A three-level model is used to explain the observed irradiance dependence of the nonlinearity. © 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)385-391
Number of pages7
JournalOptics Communications
Issue number3-6
Publication statusPublished - 15 Mar 2002


  • Nonlinear optics
  • Nonlinear refractive index
  • Organics


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