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Dispersion engineered metasurfaces for broadband, high-NA, high-efficiency, dual-polarization analog image processing

Engineering and Technology

Dispersion engineered metasurfaces for broadband, high-NA, high-efficiency, dual-polarization analog image processing

M. Cotrufo, A. Arora, et al.

Discover how cutting-edge dispersion engineering can optimize key performance metrics in silicon metasurfaces for analog image processing. This groundbreaking research, conducted by Michele Cotrufo, Akshaj Arora, Sahitya Singh, and Andrea Alù, demonstrates isotropic, dual-polarization edge detection with remarkable efficiency and bandwidth characteristics. Join us in exploring the future of high-efficiency broadband optical computing!

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Playback language: English
Abstract
Current metasurface designs for analog image processing suffer from trade-offs between resolution, throughput, polarization asymmetry, bandwidth, and isotropy. This paper demonstrates that dispersion engineering optimizes these metrics simultaneously. Silicon metasurfaces are experimentally shown to perform isotropic, dual-polarization edge detection with numerical apertures above 0.35 and 35 nm bandwidths around 1500 nm. Quantitative metrics reveal high throughput efficiencies, approaching theoretical limits. These results advance low-loss, high-efficiency broadband optical computing and image processing.
Publisher
Nature Communications
Published On
Nov 04, 2023
Authors
Michele Cotrufo, Akshaj Arora, Sahitya Singh, Andrea Alù
Tags
metasurfaces
image processing
dispersion engineering
edge detection
optical computing
high efficiency
polarization

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