Ultra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains

Shuaiqin Wu; Yan Chen; Xudong Wang; Hanxue Jiao; Qianru Zhao; Xinning Huang; Xiaochi Tai; Yong Zhou; Hao Chen; Xingjun Wang; Shenyang Huang; Hugen Yan; Tie Lin; Hong Shen; Weida Hu; Xiangjian Meng; Junhao Chu; Jianlu Wang

doi:10.1038/s41467-022-30951-y

Ultra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains

Nat Commun. 2022 Jun 9;13(1):3198. doi: 10.1038/s41467-022-30951-y.

Authors

Shuaiqin Wu^#^{1

2}, Yan Chen^#¹, Xudong Wang³, Hanxue Jiao^{1

2}, Qianru Zhao^{1

2}, Xinning Huang^{1

2}, Xiaochi Tai^{1

2}, Yong Zhou¹, Hao Chen¹, Xingjun Wang¹, Shenyang Huang⁴, Hugen Yan⁴, Tie Lin^{1

2}, Hong Shen^{1

2}, Weida Hu^{1

2}, Xiangjian Meng^{1

2}, Junhao Chu^{1

2}, Jianlu Wang^{5

6

7}

Affiliations

¹ State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, No.500 Yutian Road, 200083, Shanghai, China.
² University of Chinese Academy of Sciences, No.19 A Yuquan Road, 100049, Beijing, China.
³ State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, No.500 Yutian Road, 200083, Shanghai, China. wxd0130@mail.sitp.ac.cn.
⁴ State Key Laboratory of Surface Physics, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and Department of Physics, Fudan University, 200433, Shanghai, China.
⁵ State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, No.500 Yutian Road, 200083, Shanghai, China. jlwang@mail.sitp.ac.cn.
⁶ Frontier Institute of Chip and System, Fudan University, 200433, Shanghai, China. jlwang@mail.sitp.ac.cn.
⁷ Shanghai Frontier Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, 200433, Shanghai, China. jlwang@mail.sitp.ac.cn.

^# Contributed equally.

Abstract

With the further miniaturization and integration of multi-dimensional optical information detection devices, polarization-sensitive photodetectors based on anisotropic low-dimension materials have attractive potential applications. However, the performance of these devices is restricted by intrinsic property of materials leading to a small polarization ratio of the detectors. Here, we construct a black phosphorus (BP) homojunction photodetector defined by ferroelectric domains with ultra-sensitive polarization photoresponse. With the modulation of ferroelectric field, the BP exhibits anisotropic dispersion changes, leading an increased photothermalelectric (PTE) current in the armchair (AC) direction. Moreover, the PN junction can promote the PTE current and accelerate carrier separation. As a result, the BP photodetector demonstrates an ultrahigh polarization ratio (PR) of 288 at 1450 nm incident light, a large photoresponsivity of 1.06 A/W, and a high detectivity of 1.27 × 10¹¹ cmHz^1/2W^-1 at room temperature. This work reveals the great potential of BP in future polarized light detection.