Spin detector for panchromatic circularly polarized light detection

Lvpeng Yang, Yerun Gao, Zhenye Wang, Long Yang and Ming Shao ()
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Lvpeng Yang: Huazhong University of Science and Technology
Yerun Gao: Huazhong University of Science and Technology
Zhenye Wang: Huazhong University of Science and Technology
Long Yang: Huazhong University of Science and Technology
Ming Shao: Huazhong University of Science and Technology

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

Abstract: Abstract Circularly polarized light (CPL) detection is crucial for optical communication, bioimaging and quantum computing. However, CPL detectors based on chiral low-dimensional perovskites face a trade-off between optoelectronic performance and CPL discrimination, and typically exhibit a CPL response within a narrow spectral range. Here, we overcome these limitations by integrating three-dimensional (3D) and chiral-two-dimensional (2D) perovskites. The 3D perovskite serving as the photoabsorption layer extends the detection range to 760 nm and enhances optoelectronic responses, while also generating spin-polarized carriers through large Rashba splitting. The chiral-2D perovskite achieves spin filtering efficiency up to 80%. The synergy between spin polarization and chiral-induced spin selectivity processes enables a panchromatic CPL response, with a photocurrent asymmetry factor exceeding 0.28 across the visible spectrum and peaking at 0.35. Furthermore, our detector achieves a detectivity of 3.7×1011 Jones. Our work introduces a spin manipulation strategy for panchromatic CPL detection, expanding the scope of spintronics applications.

Date: 2025
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DOI: 10.1038/s41467-025-59287-z

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