Title:	Nonlinear optical studies of a newly synthesized copolymer containing oxadiazole and substituted thiophenes
Authors:	John Kiran, A. Udayakumar, D. Chandrasekharan, K. Adhikari, A.V. Shashikala, H.D. Philip, Reji
Keywords:	Z-scan Four wave mixing Polythiophenes Optical limiting Nonlinear optics
Issue Date:	1-Mar-2007
Publisher:	Elsevier B.V.
Citation:	Optics Communications, 2007, Vol.271, p236-240
Abstract:	We investigated the third-order nonlinear optical properties of a newly synthesized soluble copolymer containing oxadiazole and thiophene units using Z-scan and Degenerate Four Wave Mixing (DFWM) techniques. The measurements were performed at 532 nm with 7 ns pulses from a Nd:YAG laser. We found a good agreement between the values of χ(3) determined from both experiments. Z-scan results indicate a negative nonlinear refractive index, n2, whose magnitude is of the order of 10−10 esu. The copolymer exhibits strong nonlinear absorption and good optical limiting properties at 532 nm, and hence may be a potential material for optical limiting applications.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/2109
ISSN:	0030-4018
Alternative Location:	http://dx.doi.org/10.1016/j.optcom.2006.10.003
Copyright:	2007 Elsevier B.V.
Appears in Collections:	Research Papers (LAMP)

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