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Third-harmonic generation performance of organic polymer films doped with triphenylmethane derivative dyes

✍ Scribed by G. Ramos-Ortiz; J.L. Maldonado; M.A. Meneses-Nava; O. Barbosa-García; M. Olmos; M. Cha

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
250 KB
Volume
29
Category
Article
ISSN
0925-3467

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✦ Synopsis

We report on third-order nonlinear properties of triphenylmethane derivative dyes by measuring third-harmonic generation (THG) for fundamental wavelengths within the range 1100-1800 nm. Our studies show that the triphenylmethane dyes Crystal Violet and Ethyl Violet, with a multidirectional charge transfer in their three-fold symmetry structure (octupolar dimensionality), exhibit a third-order nonlinear susceptibility of the order v (3) $ 10 À12 esu when are used as dopants in polymer films. These films, with low residual absorption and anomalous refractive index dispersion for harmonic wavelengths, exhibit efficient THG as a bulk effect. The films are good candidates for ultra-fast optical correlators.

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