Van der Waals heterojunction ReSe2/WSe2 polarization-resolved photodetector

• 作者: Xiaoyu Tian Yushen Liu
• 来源期刊: 半导体学报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: ARTICLES
• 页码范围: 49-53
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-4926/42/3/032001

摘要

Polarization-resolved photodetectors,a significant branch of photodetection,can more effectively distinguish the target from the background by exploiting polarization-sensitive characteristics.However,due to the absence of intrinsic polarized absorption properties of many materials,there is still a great challenge to develop the high-performance polarization-resolved photodetectors.Here,we report a van der Waals heterojunction (vdWH) ReSe2/WSe2 photodetector,which performs a high responsivity of ～0.28 A/W and a high detectivity of 1.1 × 1012 Jones under the illumination of 520 nm laser at room temperature.Remarkably,scanning photocurrent mapping (SPCM) measurements demonstrate the photoresponse of devices closely depend on the polarized angle of the incident light,indicating the effective polarized light detection.This work paves the way to develop high-performance polarization-resolved photodetectors based on two-dimensional (2D) materials.