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Published November 1, 2018 | v3
Journal Article Open

Wide-angular-range and high-resolution beam steering by a metasurface-coupled phased array

Abstract

Optical beam steering has broad applications in lidar, optical communications, optical interconnects, and spatially resolved optical sensors. For high-speed applications, phased-array-based beam-steering methods are favored over mechanical methods, as they are unconstrained by inertia and can inherently operate at a higher speed. However, phased-array systems exhibit a tradeoff between angular range and beam divergence, making it difficult to achieve both a large steering angle and a narrow beam divergence. Here, we present a beam-steering method based on wavefront shaping through a disorder-engineered metasurface that circumvents this range-resolution tradeoff. We experimentally demonstrate that, through this technique, one can continuously steer an optical beam within a range of 160° (80° from normal incidence) with an angular resolution of about 0.01° at the cost of beam throughput.

Additional Information

© 2018 Optical Society of America. Received 17 August 2018; accepted 19 September 2018; posted 25 September 2018 (Doc. ID 342620); published 18 October 2018. We thank Dr. Atsushi Shibukawa, Dr. Haowen Ruan, and Dr. Yan Liu for helpful discussions. Funding: National Institutes of Health (NIH) (NIH- R21EY026228A); Natural Sciences and Engineering Research Council of Canada (NSERC) (NSERC PGSD3).

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October 18, 2023
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October 18, 2023