@inproceedings{073ad1ad0cba4fa88c6ea4e1a0fa9637,
title = "Scalable low-power silicon photonic platform for all-solid-state beam steering",
abstract = "Solid-state beam steering is the key to realize miniature, mass-producible LIDAR (Light Detection And Ranging) and freespace communication systems without using any moving parts. The huge power consumption required in solid-state beam steering, however, prevents this technology from further scaling. Here we show two different approaches to enable lowpower solid-state beam steering. In the first approach, we use spatial-mode multiplexing to reduce the power consumption of the phase shifters in a large-scale optical phased array. We show an improvement of phase shifter power consumption by nearly 9 times, without sacrificing optical bandwidth or operation speed. Using this approach, we demonstrate 2D beam steering with a silicon photonic phased array containing 512 actively controlled elements. This phased array consumes only 1.9 W of power while steering over a 70° × 6° field of view. This power consumption is at least an order of magnitude lower compared to other demonstrated large-scale active phased arrays. In the second approach, we achieve 2D beam steering with a switchable emitter array and a metalens that collimates the emitted light. The power consumption of this approach scales logarithmically with the number of emitters and therefore favors large-scale systems. This approach allows straightforward feedback control and better robustness to environmental temperature change. Our approaches demonstrate a path forward to build truly scalable beam steering devices.",
keywords = "Beam steering, LIDAR, Metalens, Metasurface, Optical phased array, Silicon photonics",
author = "You-Chia Chang and Miller, {Steven A.} and Phare, {Christopher T.} and Shin, {Min Chul} and Moshe Zadka and Roberts, {Samantha P.} and Brian Stern and Xingchen Ji and Aseema Mohanty and {Jimenez Gordillo}, {Oscar A.} and Michal Lipson",
year = "2019",
month = jan,
day = "1",
doi = "10.1117/12.2519803",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Islam, {M. Saif} and Thomas George",
booktitle = "Micro- and Nanotechnology Sensors, Systems, and Applications XI",
address = "United States",
note = "null ; Conference date: 14-04-2019 Through 18-04-2019",
}