Plasmonic computing of spatial differentiation

Nature Communications
Tengfeng ZhuShanhui Fan

Abstract

Optical analog computing offers high-throughput low-power-consumption operation for specialized computational tasks. Traditionally, optical analog computing in the spatial domain uses a bulky system of lenses and filters. Recent developments in metamaterials enable the miniaturization of such computing elements down to a subwavelength scale. However, the required metamaterial consists of a complex array of meta-atoms, and direct demonstration of image processing is challenging. Here, we show that the interference effects associated with surface plasmon excitations at a single metal-dielectric interface can perform spatial differentiation. And we experimentally demonstrate edge detection of an image without any Fourier lens. This work points to a simple yet powerful mechanism for optical analog computing at the nanoscale.

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Citations

Mar 8, 2018·Science and Technology of Advanced Materials·Chaonan ChenHui Ye
May 6, 2019·Nature Communications·Farzad Zangeneh-Nejad, Romain Fleury
Oct 19, 2017·Optics Express·Leonid L DoskolovichVictor A Soifer
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May 19, 2019·Proceedings of the National Academy of Sciences of the United States of America·Junxiao ZhouZhaowei Liu
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Nov 28, 2019·Optics Letters·Wei ZhangRajind Mendis
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Jun 2, 2018·Optics Letters·Sachin Kasture
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Sep 2, 2021·Optics Letters·Chenyuan XuXinliang Zhang
Oct 14, 2021·Nano Letters·Xiaomeng ZhangJason G Valentine
Aug 17, 2021··Jingchao SongTimothy J. Davis

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