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Abstract
Two-photon absorption and two-photon absorption cross-section of perylene and its derivative dissolved in chloroform and dimethyl sulfoxide were estimated using nonlinear transmission technique. It was found that the studied materials exhibit high two-photon absorption process in ps regime. The value of two-photon absorption cross-section of perylene derivative is higher by a factor of 3 compared to perylene. This fact could be due to longer conjugation length of molecule. However, no solvent effect was observed.
Acknowledgements
Author would like to thank prof. W. Bala for powders.