A new tiny chip can steer a laser beam across a massive 160-degree field without moving a single part.
April 17, 2026
Original Paper
Ultrawide-angle diffraction-limited 2D beam steering via hybrid integrated metasurface-photonic circuit
arXiv · 2604.13233
The Takeaway
Usually, if you want to scan a laser (like for a self-driving car's LiDAR), you need spinning mirrors or bulky equipment. This new hybrid chip uses metasurfaces to steer the beam over an ultra-wide angle while keeping it perfectly sharp. It is like having a fisheye lens that you can look through just by changing an electrical signal. This could shrink the bulky sensors on top of self-driving cars into a tiny, invisible dot on the windshield. It is also a game-changer for high-speed satellite communications, allowing them to track each other across the sky instantly.
From the abstract
Two-dimensional (2D) wide field-of-view (FOV) beam steering is a key enabling capability for emerging free-space optical systems, including inter-satellite optical links, airborne LiDAR, point-to-point optical wireless communications, and collaborative robotic platforms. These applications require rapid acquisition and tracking across both azimuth and elevation; architectures that offer wide scanning in only one dimension while maintaining limited coverage in the orthogonal direction constrain l