Picosecond dynamic of aqueous sodium-copper chlorophyllin solution: an excited state absorption study
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2018
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This work reports on the singlet excited-state absorption spectrum of sodium-copper chlorophyllin using three distinct methods of Z-Scan measurement: white-light continuum Z-Scan technique ranging from 470 to 780 nm, tunable Z-Scan technique with femtosecond pulses (490–700 nm) and 532 nm Z-Scan technique with 100 ps pulse width. A transition from reverse saturation absorption (RSA) to saturable absorption (SA) was observed at 570 nm, and at 532 nm RSA was tested showing potential application as optical limiting device. Pump-probe technique was used to measure lifetime of the first singlet excited state (22 ps) and no evidence of triplet conversion was observed.
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SCIUTI, L. F. et al. Picosecond dynamic of aqueous sodium-copper chlorophyllin solution: an excited state absorption study. Chemical Physics Letters, Amsterdam, v. 706, p. 652-657, 2018. DOI: 10.1016/j.cplett.2018.07.016. Disponível em: https://www.sciencedirect.com/science/article/pii/S000926141830561X. Acesso em: 3 jul. 2024.