Nonlinear absorption

Nonlinear absorption, scattering and optical

limiting studies of CdS nanoparticles

N. Venkatram and D. Narayana Rao

School of Physics, University of Hyderabad, Hyderabad 500 046, India

M. A. Akundi

Physics Department, Xavier University of Louisiana, New Orleans, Louisiana – 70125, USA

Abstract: The nonlinear optical absorption, scattering and optical limiting properties of CdS nanoparticles dispersed in dimethylformamide (DMF) are investigated. The nanoparticles are synthesized using the standard chemical synthesis method with thioglycerol as the capping agent. The investigations are carried out at 532 nm in the ns regime. Strong two-photon absorption and nonlinear scattering are found to be responsible for good optical limiting characteristics in these nanoparticles. © 2005 Optical Society of America

OCIS codes: (190.5890) Scattering, stimulated; (190.5970) Semiconductor nonlinear optics including MQW; (190.3970) Micro particle nonlinear optics.

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#5971 - $15.00 US

Received 6 December 2004; revised 23 January 2005; accepted 24 January 2005

(C) 2005 OSA

7 February 2005 / Vol. 13, No. 3 / OPTICS EXPRESS 867

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