(See Figure and SI2 for the dark current and optical microscopy images, "flake 1".) Typical steady state and non-steady-state responses are shown in Fig. (blue) and Fig. (blue), respectively, which are consistent with our previous studies on WSe2. To decrease the photoresistance of the same device, we increase the irradiance per area by repeating the same measurements within a confocal microscope using a diffraction-limited focussed laser beam.