Strain-Enabled Giant Second-Order Susceptibility in Monolayer WSe${}_2$

Zhizi Guan, Yunkun Xu, Junwen Li +3

Monolayer WSe${}_2$ (ML WSe${}_2$) exhibits a high second-harmonic generation (SHG) efficiency under single 1-photon (1-p) or 2-photon (2-p) resonant excitation conditions due to enhan…