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Substrate-integrated photonic doping for near-zero-index devices

Author

Listed:
  • Ziheng Zhou

    (Tsinghua University)

  • Yue Li

    (Tsinghua University)

  • Hao Li

    (Tsinghua University)

  • Wangyu Sun

    (Tsinghua University)

  • Iñigo Liberal

    (Public University of Navarre
    Navarrabiomed)

  • Nader Engheta

    (University of Pennsylvania)

Abstract

Near-zero-index (NZI) media, a medium with near zero permittivity and/or permeability, exhibits unique wave phenomena and exciting potential for multiple applications. However, previous proof-of-concept realizations of NZI media based on bulky and expensive platforms are not easily compatible with low-cost and miniaturization demands. Here, we propose the method of substrate-integrated (SI) photonic doping, enabling the implementation of NZI media within a printed circuit board (PCB) integrated design. Additionally, the profile of the NZI device is reduced by half by using symmetries. We validate the concept experimentally by demonstrating NZI supercoupling in straight and curve substrate integrated waveguides, also validating properties of position-independent photonic doping, zero-phase advance and finite group delay. Based on this platform, we propose design of three NZI devices: a high-sensitivity dielectric sensor, an efficient acousto-microwave modulator, and an arbitrarily-curved ‘electric fiber’. Our results represent an important step forward in the development of NZI technologies for microwave/terahertz applications.

Suggested Citation

  • Ziheng Zhou & Yue Li & Hao Li & Wangyu Sun & Iñigo Liberal & Nader Engheta, 2019. "Substrate-integrated photonic doping for near-zero-index devices," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12083-y
    DOI: 10.1038/s41467-019-12083-y
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    Cited by:

    1. Wendi Yan & Ziheng Zhou & Hao Li & Yue Li, 2023. "Transmission-type photonic doping for high-efficiency epsilon-near-zero supercoupling," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Hao Li & Ziheng Zhou & Wangyu Sun & Michaël Lobet & Nader Engheta & Iñigo Liberal & Yue Li, 2022. "Direct observation of ideal electromagnetic fluids," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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