Fig. 5: SHG tunability.
From: In-fibre second-harmonic generation with embedded two-dimensional materials
a, SH intensity versus input polarization compared with the functionalized surface; 0° indicates horizontal polarization and 90° denotes vertical polarization for both experimental result and numerical calculation. Here x and y polarizations mean the near-degenerate fundamental modes with mostly horizontally or vertically polarized directions, respectively. b–d, Experimentally acquired images of the light distribution of the SHG field at the facet of a MoS2-coated ECF. Input polarization at 0° (b), 40° (c) and 90° (d).
