High discrimination infrared polarimetry via intrinsic anisotropic photogating in black phosphorus meta-polarization detectors

Yonghao Bu, Tao Ye, Ruowen Wang, Jing Zhou (), Jie Deng, Yuran Zhen, Mengdie Shi, Wenji Jing, Rui Xin, Yujie Zhang, Junwei Huang, Tianxin Li, Wei Lu and Xiaoshuang Chen ()
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Yonghao Bu: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Tao Ye: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Ruowen Wang: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Jing Zhou: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Jie Deng: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Yuran Zhen: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Mengdie Shi: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Wenji Jing: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Rui Xin: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Yujie Zhang: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Junwei Huang: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Tianxin Li: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Wei Lu: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Xiaoshuang Chen: Chinese Academy of Sciences, State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Filterless miniaturized polarization photodetectors are essential for next-generation ultracompact optical and optoelectronic systems. However, achieving high polarization discrimination and high sensitivity over a broad wavelength range based on a simple device structure remains difficult. Here, we address this challenge by leveraging a band modulation effect induced by intrinsic anisotropic photogating. We realize a meta-polarization-detector consisting of a black phosphorus (BP) flake partially supported by SiO2 with trap states and partially supported by hexagonal boron nitride (hBN) with almost no trap states. The band distribution and hence the self-powered photocurrent are significantly influenced by light illumination in a polarization dependent manner. The polarization extinction ratio (PER) tending to ∞/−∞ is achieved over the near- to mid-infrared range with high specific detectivity. Further, our device achieves PER = ∞/−∞ under blackbody radiation. The specific polarization angle detectivity reaches 3 × 107 cm Hz0.5 W−1 degree−1. Despite utilizing the photogating effect, the photoresponse times are of the order of microseconds. Our work provides a promising approach for high performance ultracompact polarization photodetectors.

Date: 2025
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DOI: 10.1038/s41467-025-65128-w

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