Extended Data Figure 6: SHG intensity versus excitation energy before and after phase transition.
From: Structural phase transition in monolayer MoTe2 driven by electrostatic doping
At a gate bias of 0 V and a pump wavelength of 1,100 nm, a notable excitonic resonance is observed in a 2H-phase MoTe2 monolayer. At the same pump power but a bias of 4.4 V, the SHG intensity drops by more than one order of magnitude over the entire excitation spectrum range. The incident excitation power for each wavelength was fixed at the same level. The sample was kept at a temperature of 220 K during the measurements.
