题目：Anisotropic Coupling-Based 2D Material Dember Polarized Photodetectors
作者：Yining Hao1,2, Tianyi Hang1,2, Chenghao Chen1,2, Chengzhuang Zhang1,2, Yijing Chen1,2, Chengcheng Yu1,2, Shaolong Wu1,2, Jiong Yang1,2, Zhenhai Yang1,2,*, Xiaofeng Li1,2,*, and Guoyang Cao1,2,*
单位：
a School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
b Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China
摘要：Polarization photodetectors (PPDs) based on 2D materials hold great promise for ultracompact polarimeters due to their ability to directly detect polarization states. However, the existing PPDs based on 2D materials tend to focus on a single metric, making it challenging to obtain both a large polarization ratio (PR) and high responsivity (R). Here, black phosphorus (BP) PPDs are proposed under a nanowire configuration that enables large PR and high R simultaneously. Benefitting from the anisotropic coupling between the BP crystal and the nanowire geometry, specific light-field distributions are formed under orthogonally polarized light incidences, through selectively exciting the localized surface plasmon and leaky-mode resonances. A large carrier concentration gradient inherent to this structure is formed to induce a high response contrast and a large Dember current, enabling an ultrahigh PR ≈ 118.4, R ≈ 802.42 A W−1, and ultrashort response time ≈ 636 ps. Finally, a key-free optical encryption communication system is constructed, demonstrating one of its promising applications.
影响因子：18.5
链接：//doi.org/10.1002/adfm.202416475