Fig. 3
From: Widely tunable black phosphorus mid-infrared photodetector
Tunable photoresponse in the dual-gate 10-layer mid-IR BP photodetector. a–c Photocurrents as function of top gate biases at different static back gate biases for 3.4 (a), 5 (b), and 7.7 μm (c) incident lasers. The incident laser powers are 40, 50, and 100 μW for 3.4, 5, and 7.7 μm wavelengths, respectively. The source-drain voltage is 300 mV. d Peak photocurrents at different displacements fields for 5 and 7.7 μm incident lasers
