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Vanadium dioxide-based H-shaped terahertz metasurface for beam modulation

Author

Listed:
  • Lianjie Li
  • Yaxuan Han
  • Baoyu Yang
  • Yong Juan
  • Zhao Chen
  • Junying Zhang
  • Zhi-Ling Hou

Abstract

Metasurfaces have become increasingly crucial in applications involving electromagnetic beam modulation. Herein, an H-shaped terahertz (THz) metasurface based on vanadium dioxide (VO2) is proposed to achieve an equal reflectivity amplitude of approximately 0.7 and a phase difference of 180° when VO2 is in the insulating and metallic states, with the deviation less than 0.3%. The distribution of the electromagnetic field indicates that the constant amplitude inversion phenomenon is caused by the mode change from three-quarter wavelength resonance to surface plasmon resonance. The proposed metasurface unit has a minimum size of 26.6 µm, which reduces the cost of fabrication. Additionally, five feasible size-designing schemes are proposed, in which the amplitude varies in a narrow range of 0.675–0.685 with a phase difference of 180°, solving the potential problem of dimensional distortion caused by manufacturing process limitations. This structure provides a new way for the development of high-precision and low-cost intelligent THz metasurfaces.

Suggested Citation

  • Lianjie Li & Yaxuan Han & Baoyu Yang & Yong Juan & Zhao Chen & Junying Zhang & Zhi-Ling Hou, 2024. "Vanadium dioxide-based H-shaped terahertz metasurface for beam modulation," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 38(8), pages 833-841, May.
    • Handle: RePEc:taf:tewaxx:v:38:y:2024:i:8:p:833-841
    DOI: 10.1080/09205071.2024.2339313
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