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Computation at the speed of light: metamaterials for all-optical calculations and neural networks

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ADVANCED PHOTONICS
卷 4, 期 6, 页码 -

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SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.AP.4.6.064002

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photonic computing; all-optical calculation; optical neural network; programmable metasurface

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The increasing amount of processed information is driving the demand for new computing systems, and photonic computing is emerging as an attractive alternative due to its high-speed calculations, massive parallelism, and low energy consumption. This review discusses the physical implementation of basic optical calculations using metamaterials, as well as the realization of all-optical artificial neural networks. The article provides an introduction to the mathematical principles behind optical computation methods, and explores the advantages, current problems, and potential future directions in this field.
The explosion in the amount of information that is being processed is prompting the need for new computing systems beyond existing electronic computers. Photonic computing is emerging as an attractive alternative due to performing calculations at the speed of light, the change for massive parallelism, and also extremely low energy consumption. We review the physical implementation of basic optical calculations, such as differentiation and integration, using metamaterials, and introduce the realization of all-optical artificial neural networks. We start with concise introductions of the mathematical principles behind such optical computation methods and present the advantages, current problems that need to be overcome, and the potential future directions in the field. We expect that our review will be useful for both novice and experienced researchers in the field of all-optical computing platforms using metamaterials.

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