Journal
OPTICS COMMUNICATIONS
Volume 507, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2021.127519
Keywords
Metasurface; Terahertz sensor; Fano resonance; Polarization independence
Categories
Funding
- National Science Foundation of China [62106093]
- Hebei Key and Research Program, China [19255901D, 2035 5901D]
- Natural Science Foundation of Hebei Province, China [F2020208005]
- Science and Technology Research Project of Hebei Higher Education, China [QN2020435]
- Doctoral Research Initializing Fund of Hebei University of Science and Technology, China [1181382]
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In this paper, a polarization-independent and multi-resonances metasurface was designed for high-performance THz sensing. The metasurface exhibited three polarization-independent and strong resonance peaks, all showing high sensitivity to the ambient refractive index. The results of this study lay the theoretical and technical foundation for the design of high-sensitivity terahertz sensing.
Recently, benefited from the excellent capability of metasurface, the high-sensitivity THz sensing can be achieved. However, the polarization dependency and single-resonance mode still hinder the further improvement in sensitivity. In this paper, we designed a polarization-independent and multi-resonances metasurface for high-performance THz sensing. The transmission spectrum of metasurface exhibits three polarization independent and strong resonance peaks in 0.1-2.5 THz, and all of them show high sensitivity related to ambient refractive index. The transmitted structure and polarization-independent resonance can relief the difficulty of measurement. We believe these studies will lay the theoretical and technical foundation for the design of high-sensitivity terahertz sensing.
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