Patterning of Periodic Ripples in Monolayer MoS$_{2}$ by Using Laser Irradiation

We have investigated the effect of laser irradiation on monolayer MoS$_2$ and observed the swelling-up of the monolayer from the SiO$_2$ substrate upon laser illumination. The mismatch in the thermal expansion between the substrate and MoS$_{2}$ can result in the structural deformation. Employing this method, one can induce structural deformation in a desired pattern, and demonstrate the patterning of periodic ripples in monolayer MoS$_2$ by using laser irradiation. The controlled fabrication of the ripple structure may be instrumental in understanding the effect of ripples on the interesting properties of monolayer MoS$_2$.