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Advances in Materials Science and Engineering
Volume 2013, Article ID 104914, 6 pages
Research Article

Nonlocal Nonlinear Optical Response of Ionic Liquids under Violet Excitation

1Optics and Materials Group (OPTMA), Universidade Federal de Alagoas, P.O. Box 2051, 57061-970 Maceió, AL, Brazil
2Instituto de Química, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil

Received 11 December 2012; Accepted 29 May 2013

Academic Editor: Antonia Pérez de los Ríos

Copyright © 2013 Cássio E. A. Santos et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The nonlocal nonlinearity under violet excitation of ionic liquids was investigated using the Z-scan technique. The bis(trifluoromethylsulfonyl)imide (Tf2N) was employed as anionic part, while the cationic part consisted of four different imidazolium ( , with , 6, 8, and 10) derivatives. The thermooptical coefficients, nonlinear refractive indexes of thermal origin, and degree of nonlocality were obtained for laser excitation tuned at 410 nm. Our results indicate that ionic liquids can be exploited as very efficient nonlinear media with large nonlocal character under violet excitation.