Abstract
A mathematical formulation of the relationship between optical absorption coefficient of photosynthetic pigment molecules and light intensity was developed. It showed that physical parameters of photosynthetic pigment molecule (i.e., light absorption cross-section of photosynthetic pigment molecule, its average lifetime in the excited state, total photosynthetic pigment molecules, the statistical weight, or degeneracy of energy level of photosynthetic pigment molecules in the ground state and in the excited state) influenced on both the light absorption coefficient and effective light absorption cross-section of photosynthetic pigment molecules. Moreover, it also showed that both the light absorption coefficient and effective light absorption cross-section of photosynthetic pigment molecules were not constant, they decreased nonlinearly with light intensity increasing. The occupation numbers of photosynthetic pigment molecules in the excited states increased nonlinearly with light intensity increasing.
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Acknowledgments
This research was supported by the Natural Science Foundation of China (Grant No. 30960031), the Natural Science Foundation of Jiangxi Province (Grant No. 2009GZN0076), and the Key Discipline of Atomic and Molecular Physics in Jiangxi Province (2011-1015). The authors are also grateful to anonymous referees for valuable comments and helpful suggestions. The authors would like to thank editors for editing the paper and correcting the language.
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Ye, ZP. Nonlinear optical absorption of photosynthetic pigment molecules in leaves. Photosynth Res 112, 31–37 (2012). https://doi.org/10.1007/s11120-012-9730-0
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DOI: https://doi.org/10.1007/s11120-012-9730-0