Title:	Optical and nonlinear absorption properties of Na doped ZnO nanoparticle dispersions
Authors:	Karthikeyan, B. Suchand Sandeep, C.S. Pandiyarajan, T. Venkatesan, P. Philip, Reji
Issue Date:	17-Jul-2009
Publisher:	American Institute of Physics
Citation:	Applied Physics Letters, 2009, Vol.95, p023118
Abstract:	We report linear and nonlinear optical properties of the biologically important Na doped ZnO nanoparticle dispersions. Interesting morphological changes involving a spherical to flowerlike transition have been observed with Na doping. Optical absorption measurements show an exciton absorption around 368 nm. Photoluminescence measurements reveal exciton recombination emission, along with shallow and deep trap emissions. The increased intensity of shallow trap emission with Na doping is attributed to oxygen deficiency and shape changes associated with doping. Nonlinear optical measurements show a predominantly two-photon induced, excited state absorption, when excited with 532 nm, 5 ns laser pulses, indicating potential optical limiting applications
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/3886
ISSN:	0003-6951
Alternative Location:	http://dx.doi.org/10.1063/1.3182302 http://link.aip.org/link/?APPLAB/95/023118/1
Copyright:	2009 the American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Appears in Collections:	Research Papers (LAMP)

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