Title:	Switching of absorptive nonlinearity from reverse saturation to saturation in polymer-ZnO nanotop composite films
Authors:	Haripadmam, P.C. John, Honey Philip, Reji Gopinath, Pramod
Issue Date:	Dec-2014
Publisher:	American Institute of Physics
Citation:	Applied Physics Letters, 2014, Vol.105, p221102
Abstract:	We report an interesting switchover of optical nonlinearity from Reverse Saturable Absorption (RSA) to Saturable Absorption (SA) in polymer-Zinc Oxide (ZnO) nanotop composite films, investigated using the Z-scan technique. The nanocomposites have been prepared by in situ polymerization of the monomer in which ZnO nanotops are dispersed with the help of a dispersing agent. The films exhibit RSA for lower concentrations of ZnO nanotops, which changes to SA on increasing the loading concentration, irrespective of the monomer and dispersing agent used. These versatile films are good candidates for applications such as ultrafast optical switching and optical limiting.
Description:	Open Access
URI:	http://hdl.handle.net/2289/6193
ISSN:	0003-6951 1077-3118(Online)
Alternative Location:	http://dx.doi.org/10.1063/1.4903073
Copyright:	2014 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)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.