Spin-orbit-engineered plasmonic nanocircuits

Zimeng Cai; Jing Wu; Yongfeng Wu; Youqiao Ma

doi:10.1117/12.3035801

27 November 2024 Spin-orbit-engineered plasmonic nanocircuits

Zimeng Cai, Jing Wu, Yongfeng Wu, Youqiao Ma

Author Affiliations +

Proceedings Volume 13245, Plasmonics VIII; 132450U (2024) https://doi.org/10.1117/12.3035801
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

To effectively utilize photon spin is crucial for developing integrated nano-circuits on a chip. However, the spin-orbit interaction of light is typically very weak at nanoscale due to the diffraction limit. While the unidirectional transmission capability can be highly enhanced on subwavelength scales with suitable architectures. Here we propose a dielectric-loaded plasmonic nanocircuit with a spin sorting coupler to directionally couple and guide plasmonic waves through two-branched waveguides. Optimized results reveal that the waveguide modes excited by circularly polarized light with different spin states can be selectively coupled to one of the two targeted branch waveguides, with a calculated unidirectional coupling efficiency as high as 0.95. In addition, a central symmetric structure is implemented, which demonstrates great potential in designing complex interconnect nanocircuits. The illustrated approach is believed to open the way for the development of monolithic plasmonic nanocircuits with flexible freedoms.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zimeng Cai, Jing Wu, Yongfeng Wu, and Youqiao Ma "Spin-orbit-engineered plasmonic nanocircuits", Proc. SPIE 13245, Plasmonics VIII, 132450U (27 November 2024); https://doi.org/10.1117/12.3035801

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