Figure 3.

Optical measurements of PtSe₂ PDs. All devices are 50 μm wide along the waveguide direction. (a) Photocurrent as a function of light power at 4.5 V bias voltage. All PtSe₂ PDs respond linearly to the light power. (b) Responsivity vs bias voltage calculated at 9 mW laser output power. (c) Box plot of responsivities for different thickness PtSe₂ PDs measured at 4.5 V applied bias. (d) Time-resolved measurement of the PtSe₂ PDs at 8 mW optical power and 4.5 V bias voltage. The measured rise and fall times for the devices are between 8 and 13 μs.