Fig. 3: Design and optimization for higher polarization sensitivity. | Nature Communications

Fig. 3: Design and optimization for higher polarization sensitivity.

From: Polarization photodetectors with configurable polarity transition enabled by programmable ferroelectric-doping patterns

Fig. 3

a, b, c Schematic of the device structure of device 1, device 2, and device 3. The MoTe2 doped by T-shape array ferroelectric domains is marked as device 1, the MoTe2 doped into in-plane PN junction is marked as device 2, and the MoTe2 doped by a combination nano-pattern of T-shape ferroelectric domains array and PN junction is marked as device 3. d, e, f Calculated surface potential maps of 2H-MoTe2 in device 1, device 2 and device 3. g, h, i Schematic of local photocurrent generated in 2H-MoTe2 around p-n interfaces of device 1, device 2 and device 3. The red arrow (I) represents the photocurrent collected at the metal electrodes. j, k, l Simulated (Sim.) polarization photocurrent of device 1, device 2, and device 3 at 0 V bias under illumination of 1550 nm incident light. Device 3 shows an obvious improvement in polarization photocurrent.

Back to article page