Abstract
The metadevice with multiple functions in a fixed nanostructure is highly required. In this paper, we numerically achieved the dual functions of switchable broadband absorption and sensitive refractive index (RI) sensing in a fixed fishnet-shaped nanostructure by integrating with the phase change material vanadium dioxide (VO2). Exploiting the insulator-to-metal transition of VO2, the absorption strength could be dynamically switched from 0.07 to 0.97 in a broad terahertz (THz) band. Meanwhile, the same structure with metallic VO2 exhibits highly sensitive RI sensing performance. The sensitivity reaches 1.15 THz/RIU, which makes great progress. The proposed metasurface with dual functions will promote the development and applications of THz nanodevices.
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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.
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Funding
National Natural Science Foundation of China (12004080, 61705046); Funding by Science and Technology Projects in Guangzhou (202201010540).
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All authors contributed to the study’s conception and design. Theoretical analysis, structure simulation, and data collection were performed by Songliang Zhao, Huan Jiang, Jingyu Wang, Hui Zhang, and Weiren Zhao. Data processing and graph drawing were carried out by Songliang Zhao and Huan Jiang. The first draft of the manuscript is written by Songliang Zhao. All the authors read and approved the final manuscript.
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Zhao, S., Wang, J., Jiang, H. et al. Implementing the Dual Functions of Switchable Broadband Absorption and Sensitive Sensing in a VO2-Based Metasurface. Plasmonics 18, 2041–2047 (2023). https://doi.org/10.1007/s11468-023-01912-y
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DOI: https://doi.org/10.1007/s11468-023-01912-y