The linear and nonlinear optical properties of the heteroaromatic push-pull-push two-photon absorbing dye N-methyl-2,5-bis[1-(N-methylpyrid-4-yl) ethen-2-yl]-pyrrole ditriflate (PEPEP) are reported. The determination of the two-photon absorption (TPA) cross-section spectrum has been performed with different techniques: femtosecond TPA-white light continuum probe experiments, two-photon-induced fluorescence, and open aperture Z-scan measurements using both nanosecond and femtosecond laser pulses. The measured TPA cross sections and their wavelength dispersion show a marked dependence on the parameters of the laser pulses and on the measurement technique employed. These properties are discussed in terms of the different microscopic mechanisms that can contribute to the multiphoton absorption processes, with different weight depending on the measurement conditions and on the photophysical parameters of the dye. © 2008 American Chemical Society.

Signorini, ., R., :., Pedron, D., Zerbetto, N., Cecchetto, E., Slaviero, N., et al. (2008). Effective two-photon absorption cross-section of heteroaromatic quadrupolar dyes: dependence on measurement technique and laser pulse characteristics. JOURNAL OF PHYSICAL CHEMISTRY. A, MOLECULES, SPECTROSCOPY, KINETICS, ENVIRONMENT, & GENERAL THEORY, 112(18), 4224-4234 [10.1021/jp7113779].

Effective two-photon absorption cross-section of heteroaromatic quadrupolar dyes: dependence on measurement technique and laser pulse characteristics

ABBOTTO, ALESSANDRO;BEVERINA, LUCA;PAGANI, GIORGIO ALBERTO
2008

Abstract

The linear and nonlinear optical properties of the heteroaromatic push-pull-push two-photon absorbing dye N-methyl-2,5-bis[1-(N-methylpyrid-4-yl) ethen-2-yl]-pyrrole ditriflate (PEPEP) are reported. The determination of the two-photon absorption (TPA) cross-section spectrum has been performed with different techniques: femtosecond TPA-white light continuum probe experiments, two-photon-induced fluorescence, and open aperture Z-scan measurements using both nanosecond and femtosecond laser pulses. The measured TPA cross sections and their wavelength dispersion show a marked dependence on the parameters of the laser pulses and on the measurement technique employed. These properties are discussed in terms of the different microscopic mechanisms that can contribute to the multiphoton absorption processes, with different weight depending on the measurement conditions and on the photophysical parameters of the dye. © 2008 American Chemical Society.
Articolo in rivista - Articolo scientifico
cromofori, fotonica, two-photon absorption
English
mag-2008
112
18
4224
4234
none
Signorini, ., R., :., Pedron, D., Zerbetto, N., Cecchetto, E., Slaviero, N., et al. (2008). Effective two-photon absorption cross-section of heteroaromatic quadrupolar dyes: dependence on measurement technique and laser pulse characteristics. JOURNAL OF PHYSICAL CHEMISTRY. A, MOLECULES, SPECTROSCOPY, KINETICS, ENVIRONMENT, & GENERAL THEORY, 112(18), 4224-4234 [10.1021/jp7113779].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/226
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