Vector vortex beams sorting of 120 modes in visible spectrum

Polarization ( ), angular index ( ), and radius index ( ) are three independent degrees of freedom (DoFs) of vector vortex beams, which have found extensive applications in various domains. While efficient sorting of a single DoF has been achieved successfully, simultaneous sorting of all these DoFs...

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Bibliographic Details
Published in:Nanophotonics (Berlin, Germany) Germany), 2023-10, Vol.12 (20), p.3955-3962
Main Authors: Jia, Qi, Zhang, Yanxia, Shi, Bojian, Li, Hang, Li, Xiaoxin, Feng, Rui, Sun, Fangkui, Cao, Yongyin, Wang, Jian, Qiu, Cheng-Wei, Ding, Weiqiang
Format: Article
Language:English
Subjects:
Artificial neural networks
Degrees of freedom
Electron beams
Fourier transforms
Gaussian beams (optics)
mode demultiplexing
Neural networks
optical neural network
Optics
Photonics
Physics
vector vortex beam
Visible spectrum
Vortices
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Summary:Polarization ( ), angular index ( ), and radius index ( ) are three independent degrees of freedom (DoFs) of vector vortex beams, which have found extensive applications in various domains. While efficient sorting of a single DoF has been achieved successfully, simultaneous sorting of all these DoFs in a compact and efficient manner remains a challenge. In this study, we propose a beam sorter that simultaneously handles all the three DoFs using a diffractive deep neural network (D NN), and demonstrate the robust sorting of 120 Laguerre–Gaussian (LG) modes experimentally in the visible spectrum. Our proposed beam sorter underscores the considerable potential of D NN in optical field manipulation and promises to enhance the diverse applications of vector vortex beams.
ISSN:2192-8614
2192-8606
2192-8614
DOI:10.1515/nanoph-2023-0482