Fig. 4: Switchable polarization resolution detection.
a Optical microscope image of the device. The contours of b-AsP, MoS2, and bP highlighted by red, orange, and blue dashed lines, respectively. The ACbP and ACb-AsP are the AC directions of bP and b-AsP, respectively. b, c The photocurrent of the device at 0.4 V and −0.4 V with the polarization angle of the linearly polarized incident light sweeping from 0° to 360°. The scanning step of polarization angle change after each photocurrent switch change is 10°. d Polar plot of forward and reverse bias photocurrents varying from 0° to 360° in the polarization angle of incoming ray polarized light. The polarization angle of 0° is aligned along with the horizontal direction in a. e Energy band diagram of the device under forward bias. f–h Photocurrent mapping images of linearly polarized light with incident angles of 50°, 95°, and 140° at a forward bias of 0.4 V. i, Energy band diagram of the device under reverse bias. The contours of b-AsP and bP highlighted by white and blue dashed lines, respectively. j–l Photocurrent mapping images of linearly polarized light with incident angles of 30°, 75°, and 120° at a negative bias of −0.4 V. The contours of b-AsP and bP highlighted by red and white dashed lines, respectively.
