Uniaxially oriented chiral perovskite for flexible Full-Stokes polarimeter

• Full-Stokes polarization detection has high integration and portability, providing an effective way for the next generation of multi-information optoelectronic systems. However, current technologies that rely on optical filters create rigid and bulky structures that limit practicality.

  
  

  Here, Yuan Mingjian et al. of Nankai University reported for the first time a flexible filter-free full-Stokes polarimeter with a uniaxially oriented chiral perovskite film. During blade coating processes, strategic manipulation of the surfactant-mediated Marangoni effect is critical to guide balanced mass transfer to achieve directional crystallization. Through this method, the obtained uniaxially oriented chiral perovskite films are inherently anisotropic and chiral and therefore have ideal sensitivity to both linearly polarized light (LPL) and circularly polarized light (CPL) vectors. The uniaxially oriented crystal structure also improves light detection, achieving a specific detection rate of 5.23 × 1013 Jones, which is 10 times higher than that of non-oriented devices.

  
  

  The homemade flexible polarimeter can accurately capture the full Stokes polarization without a filter, and the detection error of the Stokes parameters is small: ΔS1 = 9.2%, ΔS2 = 8.6%, ΔS3 = 6.5%, which is close to that of the filter polarimeter. Detection accuracy. The proof-of-concept also demonstrates application in matrix polarization imaging.

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• Q. Chen, Z. Ding, L. Zhang, D. Wang, C. Geng, Y. Feng, J. Zhang, M. Ren, S. Li, SMH Qaid, Y. Jiang, M. Yuan, Uniaxial-Oriented Chiral Perovskite for Flexible Full-Stokes Polarimeter. Adv. Mater. 2024, 2400493.

  
  

  https://doi.org/10.1002/adma.202400493