3-Sep-2025
Single-gate electro-optic beam switching metasurfaces
Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CASPeer-Reviewed Publication
Scientists in South Korea experimentally demonstrated a single-gate electro-optic metasurface achieving efficient, wide-angle beam switching in the mid-infrared. The device modulates the Fermi level of monolayer graphene to control optical efficiencies across diffraction orders. Inverse design using a genetic algorithm and nonlocal quasinormal mode analysis enabled both high relative and absolute efficiencies with a wide 57° deflection angle. This work simplifies device architecture while retaining high performance, paving the way for practical, tunable optical beam routing applications.
- Journal
- Light Science & Applications
- Funder
- National Research Foundation of Korea (NRF), Samsung Research Funding and Incubation Center of Samsung Electronics, Ministry of Trade, Industry & Energy (MOTIE), Korea Semiconductor Research Consortium (KSRC)