Abstract
Nonlinear absorption dynamics of oxidized cytochrome c in water solution was investigated at 532 nm with Z-scan and pump–probe techniques. The optical characterization of this compound is very important owing to its similarity with hematoporphyrin-based drugs commonly used in photodynamic therapy for cancer treatment. We observed a saturable absorption process related to the excited singlet population, followed by a fast decay to the ground state. The optical excitation and subsequent relaxation were interpreted with a three-energy-level diagram, allowing the first singlet excited-state absorption cross section and lifetime determination.
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42.65.Sf; 78.66.Qn; 42.62.Be
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Barbosa Neto, N., Andrade, A., De Boni, L. et al. Excited-state absorption in oxidized cytochrome c solution. Appl Phys B 79, 751–754 (2004). https://doi.org/10.1007/s00340-004-1638-8
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DOI: https://doi.org/10.1007/s00340-004-1638-8