2026-10-12T17:50:14Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34020687 2026-09-29T07:35:41Z category_37434 portal_1023 item_type_12 month_year_09_2026

Nonvolatile reconfiguration of chirality via phase-change modulation of radiative interference in quasi-BIC metasurfaces Yufei Wang (171069) Yongtao Wu (6733394) yunzhi Zhu (25134312) yang chen (11885291) Wan-hua Zheng (12103286) Materials and Metamaterials chiral metasurface phase change materials quasi bound states in the continuum radiative interference circular dichroism polarization control <p dir="ltr">Phase-change control of chiral quasi-BIC metasurfaces has largely relied on tuning pre-established resonances. Here, we demonstrate nonvolatile reconstruction of chiral quasi-BIC states in a twisted-bilayer silicon metasurface incorporating an Sb₂S₃ interlayer. The phase transition reconstructs the radiative interference between two coherently coupled radiation channels. This enables chirality rewriting within the same TE₀-like branch, with the peak circular dichroism (CD) reversing from −0.933 to +0.974. Exploiting opposite-parity vertical modes further yields fixed-wavelength helicity inversion near 1550 nm, with CD changing from −0.896 to +0.954. These results establish radiative-interference reconstruction as a route to nonvolatile helicity control beyond conventional spectral tuning.</p> 2026-09-29T07:35:41Z Text Preprint 10.1364/opticaopen.34020687.v1 https://figshare.com/articles/preprint/Nonvolatile_reconfiguration_of_chirality_via_phase-change_modulation_of_radiative_interference_in_quasi-BIC_metasurfaces/34020687 Optica Publishing Group Non-Exclusive License