A Circularly Polarized Light Phototransistor Detector with Large Anisotropy Factor and Giant Gains

Abstract

Abstract The currently existing circularly polarized light detectors mainly rely on chiral organic semiconductors or metal metamaterials, but they have shortcomings on low visibility of circular dichroism and no integrated signal amplification units. Here, we utilize the unique structure of one-dimensional/two-dimensional (1D/2D) hybrid vertical MoS2/ZrGeTe4/MoS2 and achieved tremendous anisotropy factor up to 1.25, representing the highest value so far. Furthermore, the triode with amplification function is integrated into the device, with photocurrent gains of about 80 at 633 nm and 40 at 1064 nm. Besides, the PTD displays high circularly-polarized-light-sensitive detecting performance over a wide range of incident angles. The findings in the manuscript pave the way for the component in the future of circularly polarized light detection, providing a new approach to the miniaturization and integration of optoelectronic devices.