• Photonics Research
  • Vol. 13, Issue 3, 781 (2025)
Chao Gao1,2,3, Xiaoyu Cao1,3, Jianyu Weng1,3, Bin Zhang1,3..., Dechao Liu1,3, Yuying Mei1,3, Xuheng Yang4, Wei Liu1,3 and Bing Lei1,3,*|Show fewer author(s)
Author Affiliations
  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi’an 710028, China
  • 3Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China
  • 4College of Science, National University of Defense Technology, Changsha 410073, China
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    DOI: 10.1364/PRJ.547025 Cite this Article Set citation alerts
    Chao Gao, Xiaoyu Cao, Jianyu Weng, Bin Zhang, Dechao Liu, Yuying Mei, Xuheng Yang, Wei Liu, Bing Lei, "Broadband spectropolarimetry based on single-shot intensity images of polychromatic structured vector beams," Photonics Res. 13, 781 (2025) Copy Citation Text show less

    Abstract

    Broadband polarization measurement plays a crucial role in numerous fields, spanning from fundamental physics to a wide range of practical applications. However, traditional approaches typically rely on combinations of various dispersive optical elements, requiring bulky systems and complicated time-consuming multiple procedures. Here we have achieved broadband spectropolarimetry based on single-shot images for spatial intensity distributions of polychromatic vector beams. A custom-designed diffractive optical element and a vortex retarder convert the incident polychromatic waves into structured vector beams: the former diffracts light of different wavelengths into concentric circles of different radii, while the latter codes their polarization information into intensity distributions along the azimuthal direction. The validation experiments verify our exceptional measurement accuracy (RMS errors<1%) for each Stokes component in the visible light range (400–700 nm), with good spectral (<0.8nm) and temporal (an output rate of 100 Hz) resolutions. We have further employed our broadband polarimeter to study the mutarotation of glucose, making direct observations of temporal evolutions of chemical reactions accessible. Our work has significantly broadened the toolboxes of spectropolarimetry, which can potentially incubate various disruptive applications that depend on broadband polarization measurements.
    In×1(φi,rj)=an×4(φi,rj)·S4×1(λj)(i=1,2,,n),

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    {Sα(t)·[αα]21°Cλ+Sβ(t)·[αβ]21°Cλ=[α(t)]21°CλSα(t=0)=1,Sα(t+)=0.36Sα(t)+Sβ(t)=1,

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    Chao Gao, Xiaoyu Cao, Jianyu Weng, Bin Zhang, Dechao Liu, Yuying Mei, Xuheng Yang, Wei Liu, Bing Lei, "Broadband spectropolarimetry based on single-shot intensity images of polychromatic structured vector beams," Photonics Res. 13, 781 (2025)
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