Conjugation Length Effect on TPA-Based Optical Limiting Performance of a Series of Ladder-Type Chromophores
AbstractNonlinear optical properties of a series of newly-synthesized ladder-type chromophores containing oligo-p-phenylene moiety with different π-conjugated lengths were theoretically studied by numerically solving the rate equations and the field intensity equation with an iterative predictor-corrector finite-difference time-domain technique. Ab initio calculation results show that the compounds can be described by the three-level model. Based on the two-photon absorption mechanism, highly efficient optical limiting performances are demonstrated in the chromophores, which strongly depend on the π-conjugated length of the molecule. Special attention has been paid to the dynamical two-photon absorption, indicating that the parameter of the medium can affect the dynamical two-photon absorption cross section. Our numerical results agree well with the experimental measurements. It reveals that the increase in the π-conjugated length of ladder-type oligo-p-phenylene for these chromophores leads to enhanced nonlinear optical absorption. The results also provide a method to modulate the optical limiting and dynamical two-photon absorption of the compounds by changing the molecular density and thickness of the absorber. View Full-Text
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Zhang, Y.; Hu, W.; Zhao, L.; Leng, J.; Ma, H. Conjugation Length Effect on TPA-Based Optical Limiting Performance of a Series of Ladder-Type Chromophores. Materials 2017, 10, 70.
Zhang Y, Hu W, Zhao L, Leng J, Ma H. Conjugation Length Effect on TPA-Based Optical Limiting Performance of a Series of Ladder-Type Chromophores. Materials. 2017; 10(1):70.Chicago/Turabian Style
Zhang, Yujin; Hu, Wei; Zhao, Liyun; Leng, Jiancai; Ma, Hong. 2017. "Conjugation Length Effect on TPA-Based Optical Limiting Performance of a Series of Ladder-Type Chromophores." Materials 10, no. 1: 70.
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