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Three-dimensional spatial differentiation based on a single metalens
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DOI：10.1364/OE.546110.png)
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Spatial differentiation is the key element for edge detection and holds unquestionable significance in the current information era. All-optical computation based on metasurfaces has emerged as a powerful platform for spatial differentiation due to its advantage of high integration and parallel processing. However, while most current works focus on one- or two-dimensional (2D) spatial differentiation, three-dimensional (3D) all-optical computation for compact spatial differentiator remains elusive. In this work, by leveraging handedness multiplexing through the combination of Pancharatnam-Berry (PB) and propagation phases, we propose and demonstrate a high-integrated meta-differentiator system by a single multifocal metalens. This can simultaneously achieve 3D imaging and edge detection, i.e., work for objects at varying distances with the functionality being switchable by merely changing the handedness of the incident light, which significantly extends the capacity of spatial differentiation from a single 2D plane to a comprehensive 3D space. This expansion not only broadens the operational domain but also accelerates the speed of information processing. We anticipate this work will provide exciting opportunities to advance the application of metasurfaces in all-optical computation, information processing, and advanced imaging. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keyword:
EDGE-DETECTION
CELL
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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引用论文
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