  We theoretically investigate the nonlinear response of bent graphene, in the
presence of artificially-enhanced spin-orbit coupling, which can occur either
via adatom deposition, or by placing the sheet of bent graphene in contact with
a spin-orbit active substrate. We discuss the interplay between the spin-orbit
coupling and the artificial magnetic field generated by the bending, for both
the cases of Rashba and intrinsic spin-orbit coupling. For the latter, we
introduce a spin-field interaction Hamiltonian addressing directly the electron
spin as a degree of freedom. Our findings reveal that in this case, by
controlling the amount of spin-orbit coupling, it is possible to significantly
tune the spectrum of the nonlinear signal, achieving, in principle, efficient
conversion of light from THz to UV region.
