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<p>The in situ monitoring of different parameters of light is important for the development of high-capacity information technology. However, the number of light states increases exponentially as parameters are added, and conventional detection systems must split light signals into numerous channels and photodetectors using bulky optics. Here we report a one-pixel device that is integrated on an optical fibre tip and can simultaneously resolve the mode, polarization, wavelength and intensity of light. The device, which can generate spatially dependent responses, is based on twisted, dichroic layers of two-dimensional black phosphorus and black arsenic–phosphorus, as well as ring-grating-like electrodes. The device generates six distinct photoresponses and we use it to achieve four-dimensional light detection with one-shot measurements, creating a large recognizable input-state space of around 10<sup>4</sup>. We also show that the approach can be used for multidimensional image encryption communication.</p>

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Identification of the mode, polarization, wavelength and intensity of light using a one-pixel device on an optical fibre tip

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Yifeng Xiong,
  • Shaochen Fang,
  • Yining Xu,
  • Yu Lei,
  • Lingyi Ao,
  • Liuwei Zhan,
  • Zixuan Ding,
  • Hengtian Zhu,
  • Maojie Chen,
  • Zeya Li,
  • Wencai Ren,
  • Jinhui Chen,
  • Ye Chen,
  • Yan-qing Lu,
  • Hongtao Yuan,
  • Fei Xu

摘要

The in situ monitoring of different parameters of light is important for the development of high-capacity information technology. However, the number of light states increases exponentially as parameters are added, and conventional detection systems must split light signals into numerous channels and photodetectors using bulky optics. Here we report a one-pixel device that is integrated on an optical fibre tip and can simultaneously resolve the mode, polarization, wavelength and intensity of light. The device, which can generate spatially dependent responses, is based on twisted, dichroic layers of two-dimensional black phosphorus and black arsenic–phosphorus, as well as ring-grating-like electrodes. The device generates six distinct photoresponses and we use it to achieve four-dimensional light detection with one-shot measurements, creating a large recognizable input-state space of around 104. We also show that the approach can be used for multidimensional image encryption communication.