Perylene derivatives with large two-photon-absorption cross-sections for application in optical limiting and upconversion lasing

Oliveira, S. L.; Corrêa, D. S.; Misoguti, L.; Constantino, C. J. L.; Aroca, R. F.; Zilio, S. C.; Mendonça, C. R.

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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Perylene derivatives with large two-photon-absorption cross-sections for application in optical limiting and upconversion lasing

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Author(s):	Oliveira, S. L. ; Corrêa, D. S. ; Misoguti, L. ; Constantino, C. J. L. ; Aroca, R. F. ; Zilio, S. C. ; Mendonça, C. R. Total Authors: 7
Document type:	Journal article
Source:	Advanced Materials; v. 17, n. 15, p. 1890-1893, Aug. 2005.
Field of knowledge:	Physical Sciences and Mathematics - Physics
Abstract
The degenerate two-photon absorption (2PA) spectra of perylene tetracarboxylic derivatives (PTCD), bis(benzimidazo) perylene (AzoPTCD), and bos(benzimidazo) thioperylene, obtained by means of the Z-scan technique with femtosecond laser pulses was analyzed. Upon exposure to intense laser pulses, molecules can absorb two photons to access an excited state, each of them with half of the energy required to match the electronic transition. The concentration of PTCD derivatives used for nonlinear optical measurements were around 10-3molL-1. Under non-resonant conditions, the absorption Z-scan signature presents a decrease in the transmittance. (AU)

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