Fig. 2: Electrical characterisation of the r-PD.

a Schematic of the fabricated fibre-based PD. b Current vs voltage plot. c Light-illuminated temporal response at different bias voltages (1–5 V) under different UV illumination intensities. d Stepwise incremental response under different light intensities from 0.1 to 1 μW/cm2. e Cyclic stability, and f repeatability and decay time.