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Near-Field Observation of the Photonic Spin Hall Effect

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    Near-Field Observation of the Photonic Spin Hall Effect
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    Nano Letters

    Cite this: Nano Lett. 2023, 23, 24, 11447–11452
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    https://doi.org/10.1021/acs.nanolett.3c02829
    Published November 20, 2023
    Copyright © 2023 American Chemical Society
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    Abstract

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    The photonic spin Hall effect, referring to the spatial separation of photons with opposite spins due to spin–orbit interactions, has enabled potential for various spin-sensitive applications and devices. Here, using scattering-type near-field scanning optical microscopy, we observe spin–orbit interactions introduced by a subwavelength semiring antenna integrated in a plasmonic circuit. Clear evidence of unidirectional excitation of surface plasmon polaritons is obtained by direct comparison of the amplitude- and phase-resolved near-field maps of the plasmonic nanocircuit under excitation with photons of opposite spin states coupled to a plasmonic nanoantenna. We present details of the antenna design and experimental methods to investigate the spatial variation of complex electromagnetic fields in a spin-sensitive plasmonic circuit. The reported findings offer valuable insights into the generation, characterization, and application of the photonic spin Hall effect in photonic integrated circuits for future and emerging spin-selective nanophotonic systems.

    Copyright © 2023 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.nanolett.3c02829.

    • Spectroscopic near-field data of the ring coupler with variable excitation wavelength between 1450 and 1650 nm (PDF)

    • Movie of the measured near-field distribution and phase evolution for the plasmonic circuit using pseudoheterodyne detection in SNOM with tuned relative phase of the reference beam; near-field aplitude |E| and the phase with a sweep of the relative phase of the SNOM reference signal for incident light with right circular polarization and left circular polarization (MPG)

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    This article is cited by 5 publications.

    1. Lijuan Sheng, Zixiao Xu, Yong Cao, Yawei Tan, Xiaohui Ling, Xinxing Zhou. Effectively suppressed reflected photonic spin Hall effect. Nanophotonics 2025, 14 (7) , 993-1001. https://doi.org/10.1515/nanoph-2025-0089
    2. Junjun Shi, Kangcheng Jing, Li Li, Wenjun Zhang, Tianzhu Zhang, Xiaobo He. Second harmonic generation of optical spin−orbit interactions in hybrid plasmonic nanocircuits. Nanophotonics 2025, 14 (7) , 1003-1007. https://doi.org/10.1515/nanoph-2024-0725
    3. Nikolai I. Petrov, Yuri M. Sokolov, Vladimir V. Stoiakin, Viktor A. Danilov, Vladimir V. Popov, Boris A. Usievich. Direct observation of the enhanced photonic spin Hall effect in a subwavelength grating. Optics Letters 2025, 50 (4) , 1317. https://doi.org/10.1364/OL.549579
    4. Divyanshu Divyanshu, Amit Kumar Goyal, Yehia Massoud. Physical unclonable function using photonic spin Hall effect. Scientific Reports 2024, 14 (1) https://doi.org/10.1038/s41598-024-65176-0
    5. Hao-Ran Xu, Ting-Hao Zhang, Bao-Fei Wan, Hai-Feng Zhang. A method of multi-bit optical coding by constructing Brewster angles to enhance photonic spin Hall effect. AIP Advances 2024, 14 (10) https://doi.org/10.1063/5.0231317
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    Nano Letters

    Cite this: Nano Lett. 2023, 23, 24, 11447–11452
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.nanolett.3c02829
    Published November 20, 2023
    Copyright © 2023 American Chemical Society
    Request reuse permissions

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