Towards the Development of Ultrafast Photodetectors Based on Graphene for the Next-generation Telecommunication Systems

Here, we report on our recent efforts to develop of a photodetector based on single-layer graphene two-terminal device on the sapphire substrate. Our detector operates at 1.55 mu m, which corresponds to the telecom window. We have demonstrated that our detector operates under zero bias conditions at room temperature, and the signal-to-noise ratio reaches 45 dB. The measured frequency bandwidth reaches 20 GHz and is limited by the available experimental equipment.