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Article Abstract
Developing direct full-stokes imaging polarimetry is essential for various applications but remains challenging. Perovskites have superior optoelectronic properties and structural diversity, making them ideal candidates for high-performing direct full-stokes polarimetry. However, perovskite suffers low chiroptical activity due to inefficient chiral transfer, which greatly limits its circular-polarization-vector discrimination. These issues urgently require remedy. Here, we demonstrate that perovskites' chiroptical activity is highly related to their structural chiral-distortion extent. We propose using halide mixing to construct asymmetric chiral transfer to heighten its structural chiral-distortion extent. Accordingly, we report a 16-fold increment in the optical chiroptical activity. Further ab initio calculations verify that the enhancement is due to the strengthened magnetic transition dipole in mixed-halide structures. We herein report a self-powered, direct full-Stokes polarimetry with a high detectivity up to 1.2 × 10 Jones and low detection errors (Δ ≤ 5.0%). We further showcase their application in full-stokes imaging polarimetry with the lowest detection errors yet.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11870067 | PMC |
| http://dx.doi.org/10.1126/sciadv.ads6123 | DOI Listing |
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Article Synopsis
- - Metasurfaces enable compact and real-time polarimetry, but their narrow bandwidth limits use in polychromatic scenes, leading to loss of spectral information.
- - This study presents an achromatic polarimeter using four polarization-dependent metalenses, which achieves broad wavelength coverage from 450 to 650 nm with a relative bandwidth of about 0.364 for Stokes imaging.
- - The design significantly outperformed current technologies, showing lower reconstruction errors and validating its full-color, full-polarization capabilities with a customized object, enhancing practical applications in polarization imaging.
In the realm of metasurface-based polarimetry, well-known for its remarkable compactness and integration capabilities, previous attempts have been hindered by limitations such as the restricted choices of target polarization states and the inefficient focusing of light. To address these problems, this study introduces and harnesses a novel, to our knowledge, forward-solving model, grounded in the equivalence principle and dyadic Green's function, to inversely optimize the vectorial focusing patterns of metalenses. Leveraging this methodology, we develop and experimentally validate a single multi-foci metalens-based polarimeter, capable of simultaneously separating and concentrating four distinct elliptical polarization states at a wavelength of 10.
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