Nonlinear optical study of commensurability effects in graphene-hBN heterostructures

Quantum sensing based on nitrogen vacancy centers in diamond and boron vacancy centers in hexagonal boron nitride

“…The second harmonic generation can be used to determine the orientation of lattices and layer stacking. However, most of the thin-layer van der Waals (vdW) materials possess strong optical nonlinearities, and thus, the layer-dependent feature keeps the focus of SHG studies on the few-layer material [42,53,93,106]. Here both the linear and nonlinear transfer matrix method are introduced, which can be used to simulate the electric field distribution in multi-layer structures and the second harmonic generation signals produced by the material.…”