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On-chip terahertz isolator with ultrahigh isolation ratios

Author

Listed:
  • Shixing Yuan

    (Huazhong University of Science and Technology)

  • Liao Chen

    (Huazhong University of Science and Technology)

  • Ziwei Wang

    (Huazhong University of Science and Technology)

  • Wentao Deng

    (Huazhong University of Science and Technology)

  • Zhibo Hou

    (Huazhong University of Science and Technology)

  • Chi Zhang

    (Huazhong University of Science and Technology)

  • Yu Yu

    (Huazhong University of Science and Technology)

  • Xiaojun Wu

    (Huazhong University of Science and Technology
    School of Electronic and Information Engineering, Beihang University)

  • Xinliang Zhang

    (Huazhong University of Science and Technology)

Abstract

Terahertz isolators, one of the typical nonreciprocal devices that can break Lorentz reciprocity, are indispensable building blocks in terahertz systems for their critical functionality of manipulating the terahertz flow. Here, we report an integrated terahertz isolator based on the magneto-optical effect of a nonreciprocal resonator. By optimizing the magneto-optical property and the loss of the resonator, we experimentally observe unidirectional propagation with an ultrahigh isolation ratio reaching up to 52 dB and an insertion loss around 7.5 dB at ~0.47 THz. With a thermal tuning method and periodic resonances, the isolator can operate at different central frequencies in the range of 0.405–0.495 THz. This on-chip terahertz isolator will not only inspire more solutions for integrated terahertz nonreciprocal devices, but also have the feasibility for practical applications such as terahertz sensing and reducing unnecessary reflections in terahertz systems.

Suggested Citation

  • Shixing Yuan & Liao Chen & Ziwei Wang & Wentao Deng & Zhibo Hou & Chi Zhang & Yu Yu & Xiaojun Wu & Xinliang Zhang, 2021. "On-chip terahertz isolator with ultrahigh isolation ratios," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25881-0
    DOI: 10.1038/s41467-021-25881-0
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    Cited by:

    1. Hong Wang & Baipeng Yin & Junli Bai & Xiao Wei & Wenjin Huang & Qingda Chang & Hao Jia & Rui Chen & Yaxin Zhai & Yuchen Wu & Chuang Zhang, 2024. "Giant magneto-photoluminescence at ultralow field in organic microcrystal arrays for on-chip optical magnetometer," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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