Uniaxial-Oriented Chiral Perovskite for Flexible Full-Stokes Polarimeter

Full-Stokes polarization detection, with high integration and portability, offers an efficient path toward next-gen multi-information optoelectronic systems. Nevertheless, current techniques relying on optical filters create rigid and bulky configurations, limiting practicality. Here, a flexible, filter-less full-Stokes polarimeter featuring a uniaxial-oriented chiral perovskite film is first reported. It is found that, the strategic manipulation of the surfactant-mediated Marangoni effect during blade coating, is crucial for guiding an equilibrious mass transport to achieve oriented crystallization. Through this approach, the obtained uniaxial-oriented chiral perovskite films inherently possess anisotropy and chirality, and thereby with desired sensitivity to both linearly polarized light and circularly polarized light vectors. The uniaxial-oriented crystalline structure also improves photodetection, achieving a specific detectivity of 5.23 x 1013 Jones, surpassing non-oriented devices by 10x. The as-fabricated flexible polarimeters enable accurate capture of full-Stokes polarization without optical filters, exhibiting slight detection errors for the Stokes parameters: Delta S1 = 9.2%, Delta S2 = 8.6%, and Delta S3 = 6.5%, approaching the detection accuracy of optics-filter polarimeters. This proof of concept also demonstrates applications in matrix polarization imaging. A pioneering flexible full-Stokes polarimeter is developed and fabricated using a uniaxial-oriented chiral perovskite film. This achievement is a result of regulating fluid dynamics, specifically involving the control of the Marangoni effect during the blade coating process. The fabricated polarimeter demonstrates precise full-Stokes polarization detection, high-performance photoresponse, matrix polarization imaging capability, and superior mechanical durability. image