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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 4 — Apr. 1, 2006
  • pp: 692–696

Nonlinear photoresponse in II–VI-based nanocomposite thin films: a semiquantitative four-level model

Parinda Vasa, Bhanu P. Singh, and Pushan Ayyub  »View Author Affiliations

JOSA B, Vol. 23, Issue 4, pp. 692-696 (2006)

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We have measured the one-photon, resonant nonlinear optical properties of sputter-deposited nanocomposite CdS:ZnO thin films with a characteristic grain size of about 3 nm. These films show a completely reversible photodarkening at low fluences as well as fast recovery, making them useful for optical limiting applications. The observed photoresponse can be ascribed to excited-state absorption and is in good agreement with a semiquantitative, four-level model proposed by us.

© 2006 Optical Society of America

OCIS Codes
(190.3970) Nonlinear optics : Microparticle nonlinear optics
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(300.6470) Spectroscopy : Spectroscopy, semiconductors

ToC Category:
Nonlinear Optics

Original Manuscript: May 18, 2005
Manuscript Accepted: September 15, 2005

Parinda Vasa, Bhanu P. Singh, and Pushan Ayyub, "Nonlinear photoresponse in II-VI-based nanocomposite thin films: a semiquantitative four-level model," J. Opt. Soc. Am. B 23, 692-696 (2006)

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