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Nonlinear Optical Characterization of Monolayer Janus TMDs: SHG and THG Measurements for MoSSe and WSSe

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Nonlinear Optical Characterization of Monolayer Janus TMDs: SHG and THG Measurements for MoSSe and WSSe

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Nonlinear optical interactions are profoundly influenced by material symmetry. An example is second harmonic generation (SHG), a nonlinear optical process that exclusively occurs in materials exhibiting inversion asymmetry. In SHG, two photons of identical wavelength interact with a material, giving rise to a photon with double the frequency. The efficiency of this nonlinear process correlates directly with the second-order nonlinear susceptibility (χ(2)) components of the material.

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