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Issue 27, 2016
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Nonlinear absorption in tetrathia[22]porphyrin(2.1.2.1)s: visualizing strong reverse saturable absorption at non-resonant excitation

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Abstract

The nonlinear optical absorption properties of three meso-substituted aromatic, neutral tetrathia[22]porphyrin(2.1.2.1) compounds were investigated using an open aperture Z-scan technique at 527 nm with a pulse width of 100 ns in dichloromethane. The responses obtained were accounted for by invoking reverse saturable absorption arising due to strong excited state absorption. Both ground and excited state absorption cross-sections are reported, which follow the same trend as the respective structural parameters.

Graphical abstract: Nonlinear absorption in tetrathia[22]porphyrin(2.1.2.1)s: visualizing strong reverse saturable absorption at non-resonant excitation

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Publication details

The article was received on 31 Oct 2015, accepted on 21 Feb 2016 and first published on 22 Feb 2016


Article type: Communication
DOI: 10.1039/C5RA22861A
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RSC Adv., 2016,6, 22659-22663

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    Nonlinear absorption in tetrathia[22]porphyrin(2.1.2.1)s: visualizing strong reverse saturable absorption at non-resonant excitation

    K. Singh, S. Arora, K. Makhal, P. Kaur and D. Goswami, RSC Adv., 2016, 6, 22659
    DOI: 10.1039/C5RA22861A

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