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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 10 — May. 16, 2005
  • pp: 3594–3599

Dispersion of nonlinear refraction and two-photon absorption using a white-light continuum Z-scan

Mihaela Balu, Joel Hales, David J. Hagan, and Eric W. Van Stryland  »View Author Affiliations

Optics Express, Vol. 13, Issue 10, pp. 3594-3599 (2005)

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We use a white-light continuum (WLC) Z-scan technique to measure the degenerate two-photon absorption spectrum and associated dispersion of the nonlinear refraction in ZnSe. The spectral components of the WLC source are separated by using a narrow band variable filter to minimize nondegenerate nonlinearities. We observe a change in sign of the ultrafast nonlinear refractive index around 0.7 of the bandgap energy as predicted by theory.

© 2005 Optical Society of America

OCIS Codes
(190.4400) Nonlinear optics : Nonlinear optics, materials
(300.6420) Spectroscopy : Spectroscopy, nonlinear

ToC Category:
Research Papers

Original Manuscript: March 24, 2005
Revised Manuscript: April 27, 2005
Published: May 16, 2005

Mihaela Balu, Joel Hales, David Hagan, and Eric Van Stryland, "Dispersion of nonlinear refraction and two-photon absorption using a white-light continuum Z-scan," Opt. Express 13, 3594-3599 (2005)

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  1. G.S.He, T.C Lin, P.N. Prasad, R.Kannan, R.A. Vaia and L.S. Tan, “New technique for degenerate two-photon absorption spectral measurements using femtosecond continuum generation,” Opt. Express 10, 566 (2002). [PubMed]
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