Electro-optical modulation of light polarization in a nonlocal lithium niobate metasurface
Abstract
We report the experimental realization of a LiNbO3 metasurface for electro-optic modulation of light polarization in the telecommunication band. High-Q quasi-bound states in the continuum are emploied to enhance the modulation of amplitude and phase of an impinging beam by a driving electric field, leading to efficient polarization rotation and conversion. We quantified modulation effects under a CMOS-compatible bias at 1 MHz frequency, achieving a variation of 5% in the Stokes parameters and a variation of the polarization ellipse angles of about 3{\deg} for the transmitted light. These results demonstrate that dynamic polarization and phase modulation can be attained in a compact platform, highlighting the potential of high-Q resonant LiNbO3 metasurfaces for enhanced light-matter interaction in subwavelength electro-optic devices.
Keywords
Cite
@article{arxiv.2512.23393,
title = {Electro-optical modulation of light polarization in a nonlocal lithium niobate metasurface},
author = {Agostino Di Francescantonio and Alessandra Sabatti and Eleni Prountzou and Maria Antonietta Vincenti and Luca Carletti and Attilio Zilli and Michele Celebrano and Rachel Grange and Marco Finazzi},
journal= {arXiv preprint arXiv:2512.23393},
year = {2026}
}