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- W4386495491 abstract "Analog computing using metasurfaces offers significant potential for processing information at ultrahigh speeds and low power consumption. Among several operations, implementing spatial differentiation and edge detection with metasurfaces is an active area of research for its potential impact in the automotive industry and for image recognition. However, current designs have been suffering from limitations due to trade-offs between bandwidth, spatial resolution and efficiency. In this work, dispersion engineering of a nonlocal metasurface is leveraged to obtain analog edge detection over a moderately large operational bandwidth, without sacrificing numerical aperture and efficiency. We demonstrate the implementation of this concept by using a single-layered silicon metasurface with triangular lattice of holes, which exhibits dual-polarization and azimuthally isotropic response up to large numerical apertures (NAs ∼0.35), and with an operational bandwidth of 5 THz around a central wavelength of about 1500 nm. The proposed design approach can also be extended to other platforms, operational frequencies and materials." @default.
- W4386495491 created "2023-09-07" @default.
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- W4386495491 date "2023-07-23" @default.
- W4386495491 modified "2023-10-03" @default.
- W4386495491 title "Metasurfaces for Broadband Analog Image Processing" @default.
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- W4386495491 doi "https://doi.org/10.1109/usnc-ursi52151.2023.10237643" @default.
- W4386495491 hasPublicationYear "2023" @default.
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