Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms15391
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Funding
- Thousand Youth Talents Plan
- Fundamental Research Funds for the Central Universities [2014QNA3007]
- National Natural Science Foundation of China [NSFC 61675179]
- National Basic Research Program of China [2013CB632104]
- NSFC [61575176, 61425023]
- U.S. Air Force Office of Scientific Research [FA9550-12-1-0024, FA9550-17-1-0002]
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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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