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Van der Waals thin films of WTe2 for natural hyperbolic plasmonic surfaces

Author

Listed:
  • Chong Wang

    (Fudan University
    Fudan University)

  • Shenyang Huang

    (Fudan University
    Fudan University)

  • Qiaoxia Xing

    (Fudan University
    Fudan University)

  • Yuangang Xie

    (Fudan University
    Fudan University)

  • Chaoyu Song

    (Fudan University
    Fudan University)

  • Fanjie Wang

    (Fudan University
    Fudan University)

  • Hugen Yan

    (Fudan University
    Fudan University)

Abstract

A hyperbolic plasmonic surface supports highly directional propagating polaritons with extremely large density of states. Such plasmon polaritons have been realized in artificially structured metasurfaces. However, the upper bound of the achievable plasmon wave vector is limited by the structure size, which calls for a natural hyperbolic surface without any structuring. Here, we experimentally demonstrate a natural hyperbolic plasmonic surface based on thin films of WTe2 in the light wavelength range of 16 to 23 microns by far infrared absorption spectroscopy. The topological transition from the elliptic to the hyperbolic regime is further manifested by mapping the isofrequency contours of the plasmon. Moreover, the anisotropy character and plasmon frequency exhibit prominent temperature dependence. Our study demonstrates the first natural platform to host 2D hyperbolic plasmons, which opens exotic avenues for the manipulation of plasmon propagation, light-matter interaction and light emission in planar photonics.

Suggested Citation

  • Chong Wang & Shenyang Huang & Qiaoxia Xing & Yuangang Xie & Chaoyu Song & Fanjie Wang & Hugen Yan, 2020. "Van der Waals thin films of WTe2 for natural hyperbolic plasmonic surfaces," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15001-9
    DOI: 10.1038/s41467-020-15001-9
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    Cited by:

    1. Yixi Zhou & Adrien Waelchli & Margherita Boselli & Iris Crassee & Adrien Bercher & Weiwei Luo & Jiahua Duan & J.L.M. Mechelen & Dirk Marel & Jérémie Teyssier & Carl Willem Rischau & Lukas Korosec & St, 2023. "Thermal and electrostatic tuning of surface phonon-polaritons in LaAlO3/SrTiO3 heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Hongwei Wang & Anshuman Kumar & Siyuan Dai & Xiao Lin & Zubin Jacob & Sang-Hyun Oh & Vinod Menon & Evgenii Narimanov & Young Duck Kim & Jian-Ping Wang & Phaedon Avouris & Luis Martin Moreno & Joshua C, 2024. "Planar hyperbolic polaritons in 2D van der Waals materials," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    3. Wuchao Huang & Thomas G. Folland & Fengsheng Sun & Zebo Zheng & Ningsheng Xu & Qiaoxia Xing & Jingyao Jiang & Huanjun Chen & Joshua D. Caldwell & Hugen Yan & Shaozhi Deng, 2023. "In-plane hyperbolic polariton tuners in terahertz and long-wave infrared regimes," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    4. Eva A. A. Pogna & Valentino Pistore & Leonardo Viti & Lianhe Li & A. Giles Davies & Edmund H. Linfield & Miriam S. Vitiello, 2024. "Near-field detection of gate-tunable anisotropic plasmon polaritons in black phosphorus at terahertz frequencies," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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