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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 22, Iss. 11 — Nov. 1, 2005
  • pp: 2444–2449

Nonlinear susceptibility of colloids consisting of silver nanoparticles in carbon disulfide

Edílson L. Falcão-Filho, Cid B. de Araújo, André Galembeck, Marcela M. Oliveira, and Aldo J.G. Zarbin  »View Author Affiliations


JOSA B, Vol. 22, Issue 11, pp. 2444-2449 (2005)
http://dx.doi.org/10.1364/JOSAB.22.002444


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Abstract

Measurements of the effective third-order susceptibility χ eff ( 3 ) ( ω , ω , ω , ω ) of a colloid consisting of silver nanoparticles (NPs) in liquid carbon disulfide ( C S 2 ) are reported for excitation at 532 nm . Changes in χ eff ( 3 ) ( ω , ω , ω , ω ) were controlled varying the NP filling factor f. Cancellation and sign reversal of the nonlinear (NL) index of refraction and the NL absorption coefficient of the colloid were observed owing to competing contributions from the NP and the C S 2 molecules. The Re χ eff ( 3 ) ( ω , ω , ω , ω ) and Im χ eff ( 3 ) ( ω , ω , ω , ω ) change linearly when f assumes values from 0.4 × 10 5 to 4.0 × 10 5 . An analysis of the results is provided using a generalized Maxwell Garnett model that allowed evaluation of the NL susceptibility of the NP.

© 2005 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.3970) Nonlinear optics : Microparticle nonlinear optics
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Nonlinear Optics

Citation
Edílson L. Falcão-Filho, Cid B. de Araújo, André Galembeck, Marcela M. Oliveira, and Aldo J. G. Zarbin, "Nonlinear susceptibility of colloids consisting of silver nanoparticles in carbon disulfide," J. Opt. Soc. Am. B 22, 2444-2449 (2005)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-22-11-2444

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