Title:	Ultrafast optical nonlinearity and photoacoustic studies on chitosan-boron nitride nanotube composite films
Authors:	Kuthirummal, Narayanan Philip, Reji Mohan, Athira Jenks, Cassidy Levi-Polyachenko, Nicole
Keywords:	Chitosan Boron nitride nanotubes
Issue Date:	Jul-2016
Publisher:	Elsevier B. V.
Citation:	Optics Communications, 2016, Vol.371, p47-50
Abstract:	Ultrafast optical nonlinearity in chitosan (CS) films doped with multi-walled boron nitride nanotubes (MWBN) has been investigated using 800 nm, 100 fs laser pulses, employing the open aperture Z-scan technique. Two-photon absorption coefficients (β) of CS–MWBN films have been measured at 800 nm by Z-scan. While chitosan with 0.01% MWBN doping gives a β value of 0.28×10−13 m/W, 1% doping results in a higher β value of 1.43×10−13 m/W, showing nonlinearity enhancement by a factor of 5. These nonlinearity coefficients are comparable to those reported for silver nanoclusters in glass matrix and Pt-PVA nanocomposites, indicating potential photonic applications for MWBN doped chitosan films. Characterization of the synthesized films using Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS) reveals significant interactions between the NH and CO groups of chitosan with boron nitride.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/6477
ISSN:	0030-4018
Alternative Location:	http://dx.doi.org/10.1016/j.optcom.2016.03.051 http://adsabs.harvard.edu/abs/2016OptCo.371...47K
Copyright:	2016, Elsevier B.V.
Appears in Collections:	Research Papers (LAMP)

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