Terahertz all-optical analog differential operator based on diffractive neural networks Article Swipe
D.C. Cai
,
Cong Wang
,
Xumin Ding
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1186/s43074-025-00211-5
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1186/s43074-025-00211-5
Terahertz (THz) communication has emerged as one of the key technologies for sixth-generation (6G) wireless networks. Nevertheless, the transition to higher operational frequencies poses various challenges including high-speed digital-to-analog conversion (DACs) and analog-to-digital conversion (ADCs), heterogeneous integration of optoelectronic devices, resulting in an urgent need for solutions. In this paper, we demonstrate a groundbreaking THz analog differential operator driven by diffractive neural networks (DNN), implementing ultra-fast and high-throughput analog domain differential operations. The designed multilayer all-optical DNN composed of compact dielectric metasurfaces is trained with trigonometric functions to perform analog differential computing of complex input signals by approximating the differentiation of finite decompositions of time-domain function based on the Fourier transform theory, significantly improving integration, throughput, and processing speed. Our design has been experimentally validated to successfully implement single-direction differential operation on one-(1D) and two-dimensional (2D) signals with superior structural similarity index measure (SSIM) and peak signal-to-noise ratio (PSNR), providing a promising path for the development of integrated and ultrafast THz communication systems.
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- Type
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- Landing Page
- https://doi.org/10.1186/s43074-025-00211-5
- https://link.springer.com/content/pdf/10.1186/s43074-025-00211-5.pdf
- OA Status
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- 50
- OpenAlex ID
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All OpenAlex metadata
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https://doi.org/10.1186/s43074-025-00211-5Digital Object Identifier
- Title
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Terahertz all-optical analog differential operator based on diffractive neural networksWork title
- Type
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articleOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-12-04Full publication date if available
- Authors
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D.C. Cai, Cong Wang, Xumin DingList of authors in order
- Landing page
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https://doi.org/10.1186/s43074-025-00211-5Publisher landing page
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https://link.springer.com/content/pdf/10.1186/s43074-025-00211-5.pdfDirect link to full text PDF
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YesWhether a free full text is available
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diamondOpen access status per OpenAlex
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https://link.springer.com/content/pdf/10.1186/s43074-025-00211-5.pdfDirect OA link when available
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0Total citation count in OpenAlex
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50Number of works referenced by this work
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