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Angular-momentum nanometrology in an ultrathin plasmonic topological insulator film

Author

Listed:
  • Zengji Yue

    (RMIT University)

  • Haoran Ren

    (RMIT University
    RMIT University)

  • Shibiao Wei

    (RMIT University)

  • Jiao Lin

    (RMIT University)

  • Min Gu

    (RMIT University
    RMIT University)

Abstract

Complementary metal–oxide–semiconductor (CMOS) technology has provided a highly sensitive detection platform for high-resolution optical imaging, sensing and metrology. Although the detection of optical beams carrying angular momentum have been explored with nanophotonic methods, the metrology of optical angular momentum has been limited to bulk optics. We demonstrate angular-momentum nanometrology through the spatial displacement engineering of plasmonic angular momentum modes in a CMOS-compatible plasmonic topological insulator material. The generation and propagation of surface plasmon polaritons on the surface of an ultrathin topological insulator Sb2Te3 film with a thickness of 100 nm is confirmed, exhibiting plasmonic figures of merit superior to noble metal plasmonics in the ultraviolet-visible frequency range. Angular-momentum nanometrology with a low crosstalk of less than −20 dB is achieved. This compact high-precision angular-momentum nanometrology opens an unprecedented opportunity for on-chip manipulation of optical angular momentum for high-capacity information processing, ultrasensitive molecular sensing, and ultracompact multi-functional optoelectronic devices.

Suggested Citation

  • Zengji Yue & Haoran Ren & Shibiao Wei & Jiao Lin & Min Gu, 2018. "Angular-momentum nanometrology in an ultrathin plasmonic topological insulator film," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06952-1
    DOI: 10.1038/s41467-018-06952-1
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    Cited by:

    1. Chenhao Li & Torsten Wieduwilt & Fedja J. Wendisch & Andrés Márquez & Leonardo de S. Menezes & Stefan A. Maier & Markus A. Schmidt & Haoran Ren, 2023. "Metafiber transforming arbitrarily structured light," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Eduardo Gomes, 2020. "Sustainable Population Growth in Low-Density Areas in a New Technological Era: Prospective Thinking on How to Support Planning Policies Using Complex Spatial Models," Land, MDPI, vol. 9(7), pages 1-14, July.
    3. Mingjin Dai & Chongwu Wang & Fangyuan Sun & Qi Jie Wang, 2024. "On-chip photodetection of angular momentums of vortex structured light," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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