Work

Localized high-Q resonances enable electrically defined beam steering in lithium niobate metasurfaces

Year: 2026

Type: preprint

Abstract: High-speed beam steering for LiDAR and optical communication requires independent, reconfigurable control of optical phase. We demonstrate a metasurface combining lithium niobate's Pockels effect with high-Q (Q > 1700) silicon guided-mode resonance nanoantennas whose localized resonances allow individual electro-optic control at a 1 $μ$m pitch. Identical arrays steer light to 53.5$^\circ$ or 32.4$^\circ$, with the angle set by the bias pattern rather than antenna geometry. We measure 18.0% 0th-order modulation depth, 0.09% of incident power in the steered order, and a 940 MHz detected modulation bandwidth. Mode-overlap analysis shows how inter-element coupling limits usable Q, providing design rules for compact, high-speed beam steering.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.21027

Authors: Shim, Jiyong, Dagli, Sahil, Delgado, Hamish Carr, Dado, Remi, Chen, Chih-Yi, Pan, Feng, He, Isabella, Abdollahramezani, Sajjad, Brongersma, Mark L., Dionne, Jennifer A.

Institution: Stanford University

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Office of Science, Multidisciplinary University Research Initiative, Office of Naval Research

Awards: G1229526393, G1243123360, G1256015536, G2371548206, G303061748, G495301720, G498139845, G5570207115, G8382000481, G93008138

OpenAlex ID: W7222715504

Cites: 3

Cited by:

Related to: 10