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Study of the two-photon excitation of photoinitiator in various solvents, and the two-photon polymerization process

Bibi Safia Haq, Hidayat Ullah Khan, Khan Alam, Shehnaz Attaullah, Islam Zari, and Mian Mateenullah

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Abstract

In this study, the two-photon absorption excited fluorescence of the photosensitizer 4,4′-Bis(diethylamino)benzophenonin in different solvents is investigated by using mode-locked Ti:sapphire excitation having a wavelength of 800 nm with pulse duration of 150 fs at the rate of 1 kHz. The fluorescence signals excited by wavelengths of 800 and 400 nm have been compared. Contribution of these cross-section measurements for the two-photon polymerization processes is also reported.

© 2015 Optical Society of America

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