Figure 5

(a) The photocurrent vs time plot of rGO sensor for various excitation wavelengths: 635 nm, 785 nm, and 1064 nm (b) corresponding photoresponsivity of sensor illuminated under different wavelengths, (c) response and recovery time of sensor when illuminated with 635 nm wavelength laser, and (d) response and recovery time as a function of excitation wavelength.