fig1
Figure 1. Bare graphene photodetector. (A) Schematic diagram of device structure (device area is 100 µm in length and 1200 µm in width defined as the area between the two electrodes). (B) Raman spectrum of graphene. (C) Photoelectric on/off response under illumination in the UV to visible range (VDS = 0.2 V and VG = 0 V). (D) Responsivity at different wavelengths.
