Imaging polarimetry is one of the most widely used analytical technologies for object detection and analysis. To date, most metasurface-based polarimetry techniques are severely limited by narrow operating bandwidths and inevitable crosstalk, leading to detrimental effects on imaging quality and measurement accuracy. Here, we propose a crosstalk-free broadband achromatic full Stokes imaging polarimeter consisting of polarization-sensitive dielectric metalenses, im-plemented by the principle of polarization-dependent phase optimization. Compared with the single-polarization optimiza-tion method, the average crosstalk has been reduced over three times under incident light with arbitrary polarization ran-ging from 9 μm to 12 μm, which guarantees the measurement of the polarization state more precisely. The experimental results indicate that the designed polarization-sensitive metalenses can effectively eliminate the chromatic aberration with polarization selectivity and negligible crosstalk. The measured average relative errors are 7.08％, 8.62％, 7.15％, and 7.59％ at 9.3, 9.6, 10.3, and 10.6 μm, respectively. Simultaneously, the broadband full polarization imaging capability of the device is also verified. This work is expected to have potential applications in wavefront detection, remote sensing, light-field imaging, and so forth.

Yaxin Zhang;Mingbo Pu;Jinjin Jin;Xinjian Lu;Yinghui Guo;Jixiang Cai;Fei Zhang;Yingli Ha;Qiong He;Mingfeng Xu;Xiong Li;Xiaoliang Ma;Xiangang Luo

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China;Research Center on Vector Optical Fields,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;Key Laboratory of Optoelectronic Technology and System,Ministry of Education,Chongqing University,Chongqing 400030,China

光电进展（英文版）

[1]Yaxin Zhang;Mingbo Pu;Jinjin Jin;Xinjian Lu;Yinghui Guo;Jixiang Cai;Fei Zhang;Yingli Ha;Qiong He;Mingfeng Xu;Xiong Li;Xiaoliang Ma;Xiangang Luo-.Crosstalk-free achromatic full Stokes imaging polarimetry metasurface enabled by polarization-dependent phase optimization)[J].光电进展（英文版）,2022(11):16-28

polarimetry

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