All dielectric metasurface-based diffractive neural networks all optical computing

Yufei Liu; Weizhu Chen; Yan Zhang

doi:10.1117/12.2688132

27 November 2023 All dielectric metasurface-based diffractive neural networks all optical computing

Yufei Liu, Weizhu Chen, Yan Zhang

Proceedings Volume 12768, Holography, Diffractive Optics, and Applications XIII; 127682B (2023) https://doi.org/10.1117/12.2688132
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

Diffractive neural networks (D²NNs) have been transformative in many fields, motivating the development of various optical computing components. However, these optical computing components, achieving in diffractive optical elements (DOEs) fabricated using commercial 3D printers, are bulky, and the size of individual neurons is only comparable to the wavelength scale. They simultaneously suffer from challenges posed by high-order diffraction and low spatial utilization. Here, we present a design of D²NNs based on all-dielectric metasurfaces, which reduces the size of individual neurons of optical D²NNs to scales significantly smaller than the wavelength. In order to demonstrate that our metasurface-based D²NNs are smart and sensitive enough comparable to state-of-the-art DOE-based D²NNs, we numerically simulated the design of two D²NNs including an optical 1-bit half-adder and a full-adder. Our experiment on aforementioned half-adder proofs the advantages of our architecture. Metasurface-based optical computational elements can offer higher spatial neuron density, while completely eliminate high-order diffraction to demonstrate the feasibility. Our metasurface-based D²NNs can facilitate miniaturization and integration on all-optical information processing especially optical computing components, and will find applications in numerous space-constrained fields such as 6G communication, optical smart sensors, and robotics.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yufei Liu, Weizhu Chen, and Yan Zhang "All dielectric metasurface-based diffractive neural networks all optical computing", Proc. SPIE 12768, Holography, Diffractive Optics, and Applications XIII, 127682B (27 November 2023); https://doi.org/10.1117/12.2688132

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