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Inverse design of metasurfaces with non-local interactions

Engineering and Technology

Inverse design of metasurfaces with non-local interactions

H. Cai, S. Srinivasan, et al.

Discover groundbreaking advancements in metasurface technology! This research, conducted by Haogang Cai and colleagues, presents a global evolutionary optimization method to create dielectric metasurfaces that are thinner than the wavelength of light, leading to remarkable efficiencies in visible light applications.

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Playback language: English
Abstract
Conventional metasurfaces utilize thick, high-aspect-ratio nanostructures to minimize interactions between phase-shifter elements. This research proposes a global evolutionary optimization approach to design thinner-than-wavelength dielectric metasurfaces, which inherently exhibit strong electromagnetic coupling between neighboring elements. Experimental validation demonstrates high efficiencies, representing the highest reported for thinnest transmissive metalenses in visible light. The method leverages, rather than avoids, non-local interactions, and shows efficiency improvements can be achieved by lowering metasurface filling factors.
Publisher
npj Computational Materials
Published On
Aug 05, 2020
Authors
Haogang Cai, Srilok Srinivasan, David A. Czaplewski, Alex B. F. Martinson, David J. Gosztola, Liliana Stan, Troy Loeffler, Subramanian K. R. S. Sankaranarayanan, Daniel López
Tags
metasurfaces
dielectric materials
electromagnetic coupling
optimization
visible light
efficiency
nanostructures

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