dependent phase modulation of metasurfaces to encode the spectral and polarization information of incident light into a single spatially resolved intensity pattern. A trained deep neural network subsequently decodes this pattern, enabling the simultaneous reconstruction of spectral compositions and full Stokes parameters from a single-shot measurement. Experimental results validate high-accuracy spectral resolution and polarization state reconstruction across a broad wavelength range, and further confirm imaging capability. Finally, we implement a chip-integrated sensor prototype, trans- lating the metasurface DONs onto a commercial CMOS image sensor. This integration eliminates moving parts and discrete optical components, significantly reducing system complexity while enhancing robustness. 2
Source PDF · page 2RESEARCH PAPER
Integrated spectropolarimeter by metasurface-based diffractive optical networks
Jumin Qiu, Tingting Liu, Chenxuan Xiang, Tianbao Yu, Qiegen Liu, Shuyuan Xiao
Research context
Conventional spectrometer and polarimeter systems rely on bulky optics, limiting compact integration and hindering multi-dimensional optical sensing capabilities. Here, we propose a spectropolarimeter enabled by metasurface-based diffractive optical networks that simultaneously perform spectrometric and polarimetric measurements in a compact device. By leveraging the wavelength- and polarization-dependent phase modulation of metasurfaces, our system encodes the spectral and polarization information of incident light into spatially resolved intensity distributions, which are decoded by a co-designed deep neural network, enabling simultaneous high-accuracy reconstruction of spectral compositions and Stokes parameters through a single-shot measurement. Experiments validate the method’s accurate reconstruction of the spectral and polarization information across a broad wavelength range and further confirm its imaging capability. Notably, we demonstrate a chip-integrated sensor prototype combining both measurement functionalities into a commercial image sensor. This integrated platform provides a compact solution for on-chip multi-dimensional optical sensing, holding potential for versa
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Cite / 引用
Jumin Qiu, Tingting Liu, Chenxuan Xiang, Tianbao Yu, Qiegen Liu, Shuyuan Xiao. Integrated spectropolarimeter by metasurface-based diffractive optical networks. Optica (2026). https://doi.org/10.1364/optica.583686
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