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Polarization-sensitive infrared photodetectors based on van der Waals heterojunction with the unilateral depletion region by Kun Zhang; Yue Chen; Anna Liu; Ke Deng; Yue Gu; Ting He; Yang Wang; Qing Li; Zhen Wang; Haonan Ge; Fang Zhong; Peng Wang is a Engineering article available to read on EtoBox.
What is Polarization-sensitive infrared photodetectors based on van der Waals heterojunction with the unilateral depletion region about?
## Abstract In recent years, polarization infrared detection technology has made great progress and has been successfully applied in various fields such as national defense, astronomy, and civil applications. However, so far, the integration of micro polarizers and infrared photodetectors is still a big challenge since metal microstructures are severely limited in their size. As anisotropic two-dimensional (2D) materials rapidly appear, this distinctive polarization characteristic regardless of the size provides new freedom to polarization infrared photodetectors. In this paper, a van der Walls heterojunction with the unilateral depletion region was constructed to obtain polarization-sensitive infrared photodetection, in which black phosphorus (BP) serves as a natural polarizer. BP/PtS~2~ infrared photodetectors possess a fast response speed (the rise time is 56 μs and the fall time is 64 μs). At the same time, these photovoltaic detectors achieve a high detectivity of 4.47 × 10^10^ cm Hz^1/2^ W^−1^ at 830 nm. Using the anisotropic structure of BP, the photovoltaic polarization detector was realized, and its polarization extinction ratio at 830 nm was 2.66 (3.18 @ 1310 nm and 2.63
Who reads Polarization-sensitive infrared photodetectors based on van der Waals heterojunction with the unilateral depletion region?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Kun Zhang; Yue Chen; Anna Liu; Ke Deng; Yue Gu; Ting He; Yang Wang; Qing Li; Zhen Wang; Haonan Ge; Fang Zhong; Peng Wang
- Publisher
- IOP Publishing
- Published
- 2022
- Language
- EN
- Field
- Engineering (Physical Sciences)