Broadband angular spectrum differentiation using dielectric metasurfaces Article Swipe

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Ming Deng , Michele Cotrufo , Jian Wang , Jianji Dong , Zhichao Ruan , Andrea Alú , Lin Chen ·

YOU? · · 2024 · Open Access · · DOI: https://doi.org/10.1038/s41467-024-46537-9

Signal processing is of critical importance for various science and technology fields. Analog optical processing can provide an effective solution to perform large-scale and real-time data processing, superior to its digital counterparts, which have the disadvantages of low operation speed and large energy consumption. As an important branch of modern optics, Fourier optics exhibits great potential for analog optical image processing, for instance for edge detection. While these operations have been commonly explored to manipulate the spatial content of an image, mathematical operations that act directly over the angular spectrum of an image have not been pursued. Here, we demonstrate manipulation of the angular spectrum of an image, and in particular its differentiation, using dielectric metasurfaces operating across the whole visible spectrum. We experimentally show that this technique can be used to enhance desired portions of the angular spectrum of an image. Our approach can be extended to develop more general angular spectrum analog meta-processors, and may open opportunities for optical analog data processing and biological imaging.

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Optics

Computer Science

Signal Processing

Enhanced Data Rates For Gsm Evolution

$Diffraction$

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Angular spectrum method Broadband Optics Image processing Dielectric Computer science Signal processing Digital image processing Analog signal processing Digital signal processing Enhanced Data Rates for GSM Evolution Analog image processing Physics Telecommunications Optoelectronics Computer vision Image (mathematics) Computer hardware Diffraction

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Type: article
Language: en
Landing Page: https://doi.org/10.1038/s41467-024-46537-9
PDF: https://www.nature.com/articles/s41467-024-46537-9.pdf
OA Status: gold
Cited By: 160
References: 67
Related Works: 10
OpenAlex ID: https://openalex.org/W4392886376

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DOI: https://doi.org/10.1038/s41467-024-46537-9

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Title: Broadband angular spectrum differentiation using dielectric metasurfaces

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Type: article

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Language: en

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Publication year: 2024

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Publication date: 2024-03-12

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Authors: Ming Deng, Michele Cotrufo, Jian Wang, Jianji Dong, Zhichao Ruan, Andrea Alú, Lin Chen

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Landing page: https://doi.org/10.1038/s41467-024-46537-9

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PDF URL: https://www.nature.com/articles/s41467-024-46537-9.pdf

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Concepts: Angular spectrum method, Broadband, Optics, Image processing, Dielectric, Computer science, Signal processing, Digital image processing, Analog signal processing, Digital signal processing, Enhanced Data Rates for GSM Evolution, Analog image processing, Physics, Telecommunications, Optoelectronics, Computer vision, Image (mathematics), Computer hardware, Diffraction

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Cited by: 160

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Citations by year (recent): 2025: 84, 2024: 76

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