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Issue 31, 2014
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Saturable absorption and the changeover from saturable absorption to reverse saturable absorption of MoS2 nanoflake array films

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Abstract

MoS2 nanoflake array films on different glass substrates were fabricated by an in situ growth method. The nonlinear absorption (NLA) properties of the MoS2 nanoflake array films were investigated by an open-aperture Z-scan technique. The MoS2 nanoflake array films exhibited different NLA properties dependent on the input energy. In the case of lower input energy, the films exhibited saturable absorption (SA); however, if the input energy was increased, a changeover from SA to reverse saturable absorption (RSA) was observed. The interesting NLA properties of the films could be attributed to the competition between the ground-state absorption and the excited-state absorption in terms of the energy-level model of MoS2.

Graphical abstract: Saturable absorption and the changeover from saturable absorption to reverse saturable absorption of MoS2 nanoflake array films

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Publication details

The article was received on 03 May 2014, accepted on 29 May 2014 and first published on 29 May 2014


Article type: Paper
DOI: 10.1039/C4TC00909F
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J. Mater. Chem. C, 2014,2, 6319-6325

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    Saturable absorption and the changeover from saturable absorption to reverse saturable absorption of MoS2 nanoflake array films

    Q. Ouyang, H. Yu, K. Zhang and Y. Chen, J. Mater. Chem. C, 2014, 2, 6319
    DOI: 10.1039/C4TC00909F

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