17 September 2014 Harmonic generation in 2D layered materials
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Two-Dimensional (2D) layered materials have garnered interest due to their novel optical and electronic properties. In this work, we investigate Second Harmonic Generation (SHG) in Tungsten Disulfide (WS2) monolayers grown on SiO2/Si substrates and suspended on a transmission electron microscopy grid; we find an unusually large second order susceptibility, which is nearly three orders of magnitude larger than common nonlinear crystals. We have also developed a Green’s function based formalism to model the harmonic generation from a 2D layer .
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Corey Janisch, Corey Janisch, Ding Ma, Ding Ma, Nikhil Mehta, Nikhil Mehta, Ana Laura-Elias, Ana Laura-Elias, Nestor Perea-Lopez, Nestor Perea-Lopez, Mauricio Terrones, Mauricio Terrones, Zhiwen Liu, Zhiwen Liu, "Harmonic generation in 2D layered materials", Proc. SPIE 9198, Ultrafast Nonlinear Imaging and Spectroscopy II, 91980L (17 September 2014); doi: 10.1117/12.2062278; https://doi.org/10.1117/12.2062278

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