Ultra-strong nonlinear optical processes and trigonal warping in MoS${}_2$ layers

A. Säynätjoki, L. Karvonen, H. Rostami +11

We report ultra-strong high-order nonlinear multiphoton processes in monolayer MoS${}_2$ (1L-MoS${}_2$): the third harmonic is thirty times stronger than the second harmonic, and the f…