, enabling chip-scale chiral light detection and information processing. However, current developments in materials and structural designs struggle to achieve wide-spectral detection capability while maintaining high circular polarization discrimination. This limitation significantly constrains the practical applicability of such detectors in complex environments and object detection scenarios. Herein, we propose a CPL detector based on a twist-stacked black phosphorus (b-p) system. By utilizing twisted b-p as an artificially constructed unit with chiral response and designing a symmetry-stacked sandwich structure in space, we achieve bipolar circular polarization detection and imaging across a wide wavelength range (from visible light to mid- infrared), with peak responsivity reaching 0.1 A/W. This design demonstrates
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Twist-stacked black phosphorus for wide-spectral chiral photodetection
Hao Jiang, Liheng An, Xiaolong Chen, Guoqiang Xu, Yan Zhang, Jintao Fu, Xuran Dai, Yuzhe Yang, Ruihua He, Xingzhan Wei, Xiang-Long Yu, Cheng-Wei Qiu, Weibo Gao
Research context
On-chip integrable circularly polarized light (CPL) detectors hold significant potential for applications in optical communications, bioimaging, quantum information, and intelligent sensing, enabling chip-scale chiral light detection and information processing. However, current developments in materials and structural designs struggle to achieve wide-spectral detection capability while maintaining high circular polarization discrimination. This limitation significantly constrains the practical applicability of such detectors in complex environments and object detection scenarios. Herein, we propose a CPL detector based on a twist-stacked black phosphorus (b-p) system. By utilizing twisted b-p as an artificially constructed unit with chiral response and designing a symmetry-stacked sandwich structure in space, we achieve bipolar circular polarization detection and imaging across a wide wavelength range (from visible light to mid-infrared), with peak responsivity reaching 0.1 A/W. This design demonstrates both theoretically and experimentally the feasibility of utilizing a twist-stacked b-p system for wide-spectral CPL detection. This advancement offers valuable insights for addressi
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Hao Jiang, Liheng An, Xiaolong Chen, Guoqiang Xu, Yan Zhang, Jintao Fu, Xuran Dai, Yuzhe Yang, Ruihua He, Xingzhan Wei, Xiang-Long Yu, Cheng-Wei Qiu, Weibo Gao. Twist-stacked black phosphorus for wide-spectral chiral photodetection. Nature Communications (2026). https://doi.org/10.1038/s41467-026-68531-z
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