Manipulating perovskite structural asymmetry for high-performing self-powered full-stokes polarimetry.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40020053.
- Also identified by DOI 10.1126/sciadv.ads6123 and PMC identifier 11870067.
- Licence recorded as CC BY-NC.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
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<sup>12</sup> Jones and low detection errors (Δ<i>S</i><sub>1-3</sub> ≤ 5.0%). We further showcase their application in full-stokes imaging polarimetry with the lowest detection errors yet.