Patterning of periodic ripples in monolayer MoS₂ by using laser irradiation

We have investigated the effect of laser irradiation on monolayer MoS₂ and observed the swellingup of the monolayer from the SiO₂ substrate upon laser illumination. The mismatch in the thermal expansion between the substrate and MoS₂ can result in the structural deformation. Employing this method, one can induce structural deformation in a desired pattern, and one can demonstrate the patterning of periodic ripples in monolayer MoS₂ by using laser irradiation. The controlled fabrication of the ripple structure may be instrumental in understanding the effect of ripples on the interesting physical properties of monolayer MoS₂.