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- Title
Implementing the Dual Functions of Switchable Broadband Absorption and Sensitive Sensing in a VO<sub>2</sub>-Based Metasurface.
- Authors
Zhao, Songliang; Wang, Jingyu; Jiang, Huan; Zhang, Hui; Zhao, Weiren
- 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.
- Subjects
PHASE change materials; REFRACTIVE index; ABSORPTION; VANADIUM dioxide
- Publication
Plasmonics, 2023, Vol 18, Issue 6, p2041
- ISSN
1557-1955
- Publication type
Article
- DOI
10.1007/s11468-023-01912-y