✦ LIBER ✦

Nonlinear properties of polyurethane-urea/multi-wall carbon nanotube composite films

✍ Scribed by Jin Wang; Ya-Xian Fan; Jing Chen; Bing Gu; Hui-Tian Wang

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 288 KB
Volume: 42
Category: Article
ISSN: 0030-3992
DOI: 10.1016/j.optlastec.2010.01.014

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✦ Synopsis

The third-order nonlinear optical properties of polyurethane-urea/multiwalled carbon nanotube composites (PU/MWNT) films with different MWNT concentrations are investigated by the use of the Z-scan technique at a wavelength of 532 nm with a pulse duration of 8 ns. The results reveal that the nonlinear refraction and absorption coefficients are linearly dependent on the MWNT concentration. The negative nonlinear refraction effect is validated from the closed-aperture Z-scan measurements. We find that PU/MWNT films are promising nonlinear optical materials, and the nonlinear coefficients can be controlled.

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