Title:	An Optical Limiter Based on Silver-Silica Nanocomposites
Authors:	Anand, P B Sandeep, C. S. Suchand Sridharan, Kishore Narayanan, T. N. Thomas, Senoy Philip, Reji Anantharaman, M. R.
Keywords:	Optical Limiting Nonlinear Optics Metal Nanoparticles Sol–Gel Nanocomposites
Issue Date:	Feb-2012
Publisher:	Advanced Science, Engineering and Medicine
Citation:	Advanced Science, Engineering and Medicine, 2012, Vol.4, p33-38
Abstract:	Silver based nanocomposites are of high demand for their extensive biomedical applications and interesting fundamental studies. Silver and silica based nanocomposites were synthesized by a sol–gel process using tetraethyl orthosilicate and silver nitrate (AgNO3 as precursors. The silver nitrate amount was varied for obtaining composites with different nanoparticle sizes. The structural and micro-structural properties were determined from X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) measurements. Grain growth and agglomeration of nanoparticles were observed for increasing silver nitrate concentrations. Optical nonlinearities associated with these samples have been measured by employing open aperture Z-scan technique and the obtained results were fitted to appropriate nonlinear transmission equations. It is found that the composites behave as good optical limiters indicating potential in photonics applications.
Description:	Restricted Access
URI:	http://hdl.handle.net/2289/8456
ISSN:	2164-6627 2164-6635 (online)
Alternative Location:	http://dx.doi.org/10.1166/asem.2012.1115
Copyright:	American Scientific Publishers
Appears in Collections:	Research Papers (LAMP)

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