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Paper   IPM / CMNL / 15514
Condensed Matter National Laboratory
  Title:   Laser-assisted tunable optical nonlinearity in liquid-phase exfoliated MoS2 dispersion
  Author(s): 
1.  Sara Zamharir
2.  Rouhollah Karimzadeh
3.  Seyed Hamed Aboutalebi
  Status:   Published
  Journal: Appl. Physic.A
  Vol.:  124
  Year:  2018
  Pages:   692
  Publisher(s):   Springer
  Supported by:  IPM
  Abstract:
The paper aims to explain the effect of laser irradiation on the nonlinear optical (NLO) response of MoS2 nanosheets. MoS2-layered nanostructures were prepared by liquid-phase exfoliation (LPE) in deionized (DI) water. The characterization of MoS2 dispersion proves the formation of 2-3-layered 2H-MoS2 nanosheets with less than 100 nm lateral dimension. The NLO response of prepared dispersion was explored using the Z-scan technique with 532 nm continuous wave (CW) laser beam at 30, 50, 70 mW powers. The main finding of this research is that the nonlinear refractive index (n2) of MoS2 dispersion is a laser-assisted tunable quantity. It has been shown that the nonlinear refractive index of MoS2 nanosheets is altered up to 48

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