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Probing of sub-picometer vertical differential resolutions using cavity plasmons

Author

Listed:
  • Wen Chen

    (Wuhan University)

  • Shunping Zhang

    (Wuhan University)

  • Qian Deng

    (Wuhan University)

  • Hongxing Xu

    (Wuhan University
    Wuhan University)

Abstract

Plasmon rulers can be used for resolving ultrasmall environmental, dimensional, and material changes owing to their high sensitivity associated with a light-scattering spectral shift in response to changes in the separation between plasmonic nanostructures. Here, we show, in several experimental setups, how cavity plasmons in a metal nanowire-on-mirror setup can be used to probe vertical dimensional changes with sub-picometer differential resolutions using two carefully chosen material systems. Specifically, we monitor the dielectric layer thickness changes in response to growth using atomic-layer deposition and to thermal expansion, demonstrating a sensitivity of 14-nm spectral shift per Ångström thickness change and 0.58 pm of vertical differential resolution, respectively. The findings confirm theoretical predictions and highlight the potential use of cavity plasmons in some ultrasensitive sensing applications.

Suggested Citation

  • Wen Chen & Shunping Zhang & Qian Deng & Hongxing Xu, 2018. "Probing of sub-picometer vertical differential resolutions using cavity plasmons," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03227-7
    DOI: 10.1038/s41467-018-03227-7
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    Cited by:

    1. Xiang-Dong Chen & En-Hui Wang & Long-Kun Shan & Ce Feng & Yu Zheng & Yang Dong & Guang-Can Guo & Fang-Wen Sun, 2021. "Focusing the electromagnetic field to 10−6λ for ultra-high enhancement of field-matter interaction," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    2. Xiangdong Guo & Chenchen Wu & Shu Zhang & Debo Hu & Shunping Zhang & Qiao Jiang & Xiaokang Dai & Yu Duan & Xiaoxia Yang & Zhipei Sun & Shuang Zhang & Hongxing Xu & Qing Dai, 2023. "Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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