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Updated: Feb 14, 2026

Automated Behavioral Analysis of Large C. elegans Populations Using a Wide Field-of-view Tracking Platform
Published on: November 28, 2018
On-chip platform for a phased array with minimal beam divergence and wide field-of-view
Abstract:
Current silicon photonics phased arrays based on waveguide gratings enable beam steering with no moving parts. However, they suffer from a trade-off between beam divergence and field of view. Here, we show a platform based on silicon-nitride/silicon that achieves simultaneously minimal beam divergence and maximum field of view while maintaining performance that is robust to fabrication variations. In addition, in order to maximize the emission from the entire length of the grating, we design the grating's strength by varying its duty cycle (apodization) to emit uniformly. We fabricate a millimeter long grating emitter with diffraction-limited beam divergence of 0.089°.
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