Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 206, Issue -, Pages 4-9Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2015.01.053
Keywords
Self-diffraction; Carbon nanotube; Z-scan
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In this work, self-diffraction effect in carbon nanotubes (CNTs) that were dispersed on N,N-dimethylformamide (DMF) solvent is studied. Third-order nonlinear optical coefficients of this nano-suspension are measured using z-scan technique and high nonlinearity is observed. Nonlinear refraction index of the order -10(-6)cm(2)/(w) is obtained due to the thermal effect and the nonlinear interaction of the light and the surface plasmonic electrons. Optical diffraction rings of the sample under He-Ne laser illumination at a wavelength of 632.8 nm were observed and intensity distribution of the rings is explored. At last, optical limiting performance of CNTs is investigated under irradiation by a continuous wave (CW) He-Ne laser. The optical limiting behavior is investigated by using transmission measurement through the sample and our studies indicate that this material is a potential candidate for optical limiting applications in low power CW regime. (C) 2015 Elsevier B.V. All rights reserved.
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