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Thermo-optic epsilon-near-zero effects

Author

Listed:
  • Jiaye Wu

    (Photonic Systems Laboratory (PHOSL), STI-IEM)

  • Marco Clementi

    (Photonic Systems Laboratory (PHOSL), STI-IEM)

  • Chenxingyu Huang

    (Peking University
    Tsinghua University)

  • Feng Ye

    (Peking University)

  • Hongyan Fu

    (Tsinghua University)

  • Lei Lu

    (Peking University)

  • Shengdong Zhang

    (Peking University)

  • Qian Li

    (Peking University)

  • Camille-Sophie Brès

    (Photonic Systems Laboratory (PHOSL), STI-IEM)

Abstract

Nonlinear epsilon-near-zero (ENZ) nanodevices featuring vanishing permittivity and CMOS-compatibility are attractive solutions for large-scale-integrated systems-on-chips. Such confined systems with unavoidable heat generation impose critical challenges for semiconductor-based ENZ performances. While their optical properties are temperature-sensitive, there is no systematic analysis on such crucial dependence. Here, we experimentally report the linear and nonlinear thermo-optic ENZ effects in indium tin oxide. We characterize its temperature-dependent optical properties with ENZ frequencies covering the telecommunication O-band, C-band, and 2-μm-band. Depending on the ENZ frequency, it exhibits an unprecedented 70–93-THz-broadband 660–955% enhancement over the conventional thermo-optic effect. The ENZ-induced fast-varying large group velocity dispersion up to 0.03–0.18 fs2nm−1 and its temperature dependence are also observed for the first time. Remarkably, the thermo-optic nonlinearity demonstrates a 1113–2866% enhancement, on par with its reported ENZ-enhanced Kerr nonlinearity. Our work provides references for packaged ENZ-enabled photonic integrated circuit designs, as well as a new platform for nonlinear photonic applications and emulations.

Suggested Citation

  • Jiaye Wu & Marco Clementi & Chenxingyu Huang & Feng Ye & Hongyan Fu & Lei Lu & Shengdong Zhang & Qian Li & Camille-Sophie Brès, 2024. "Thermo-optic epsilon-near-zero effects," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45054-z
    DOI: 10.1038/s41467-024-45054-z
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    References listed on IDEAS

    as
    1. Yiyu Zhou & M. Zahirul Alam & Mohammad Karimi & Jeremy Upham & Orad Reshef & Cong Liu & Alan E. Willner & Robert W. Boyd, 2020. "Broadband frequency translation through time refraction in an epsilon-near-zero material," Nature Communications, Nature, vol. 11(1), pages 1-7, 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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