https://doi.org/10.1140/epjd/s10053-022-00579-0
Regular Article – Molecular Physics and Chemical Physics
Solvent effects on nonlinear absorption of meso-tetrakis methylpyridiniumyl porphyrin for picosecond pulse trains
1
College of Electronic and Information Engineering, Shandong University of Science and Technology, 266590, Qingdao, Shandong, People’s Republic of China
2
College of Electrical Engineering and Automation, Shandong University of Science and Technology, 266590, Qingdao, Shandong, People’s Republic of China
Received:
12
August
2022
Accepted:
7
December
2022
Published online:
17
December
2022
As a typical category of two-photon absorption molecules, solvent effects on dynamical properties of porphyrin were studied for picosecond pulse trains in this work. The pulse train contains 20 subpulses of 70 picoseconds width at 532 nanometers, separated by 13 nanoseconds. According to the molecular energy level distributing, porphyrin was simplified as a generalized five-level model during the nonlinear optical process, and the two-step TPA is the main absorption tunnel. In the theoretical simulation, we used Crank–Nicholson numerical method to solve entangled equations of two-dimensional paraxial field and the rate equations. Interacting with picosecond pulse trains, meso-tetrakis (methylpyridiniumyl) porphyrin (TMPyP) in aqueous and in several organic solvents shows excellent optical limiting behaviors. Besides water, negatively charged sodium dodecylsulfate, protonic methyl, ethyl and propyl alcohols and aprotic acetonitrile were considered as the solvents. Our results show that TMPyP in water has the lowest energy transmittance, which is mainly due to the formatted hydrogen bonds of nitrogen atom in TMPyP to water.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
