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

@misc{shim2026localized,
  title = {{Localized high-Q resonances enable electrically defined beam steering in lithium niobate metasurfaces}},
  author = {Jiyong Shim and Sahil Dagli and Hamish Carr Delgado and Remi Dado and Chih-Yi Chen and Feng Pan and Isabella He and Sajjad Abdollahramezani and Mark L. Brongersma and Jennifer A. Dionne},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.21027},
  eprint = {2610.21027},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.21027},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Localized high-Q resonances enable electrically defined beam steering in lithium niobate metasurfaces
AU  - Jiyong Shim
AU  - Sahil Dagli
AU  - Hamish Carr Delgado
AU  - Remi Dado
AU  - Chih-Yi Chen
AU  - Feng Pan
AU  - Isabella He
AU  - Sajjad Abdollahramezani
AU  - Mark L. Brongersma
AU  - Jennifer A. Dionne
PY  - 2026
DA  - 2026/10/14
PB  - arXiv
DO  - 10.48550/arxiv.2610.21027
UR  - https://arxiv.org/abs/2610.21027
AB  - 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 μm pitch. Identical arrays steer light to 53.5^∘ or 32.4^∘, 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.
ER  -