A Thermal-Switchable Metamaterial Absorber Based on the Phase-Change Material of Vanadium Dioxide

This article presents a thermal-switchable metamaterial absorber (TSMA) based on the phase-change material of vanadium dioxide (VO(2)). VO(2) thin film was deposited on sapphire substrate by magnetron sputtering followed by vacuum annealing treatment. Then, the prepared VO(2) film was sliced into ti...

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Detalles Bibliográficos
Autores principales: Wang, Zhongbao, Ma, Yanli, Li, Ming, Wu, Liangfei, Guo, Tiantian, Zheng, Yuejun, Chen, Qiang, Fu, Yunqi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457684/
https://www.ncbi.nlm.nih.gov/pubmed/36080039
http://dx.doi.org/10.3390/nano12173000
Descripción
Sumario:This article presents a thermal-switchable metamaterial absorber (TSMA) based on the phase-change material of vanadium dioxide (VO(2)). VO(2) thin film was deposited on sapphire substrate by magnetron sputtering followed by vacuum annealing treatment. Then, the prepared VO(2) film was sliced into tiny chips for thermal-switchable elements. The surface structure of TSMA was realized by loading four VO(2) chips into a square metallic loop. The absorption frequency of TSMA was located at 7.3 GHz at room temperature and switched to 6.8 GHz when the temperature was heated above the critical phase transition temperature of VO(2). A VO(2)-based TSMA prototype was fabricated and measured to verify this design. The design is expected to be used in metasurface antennas, sensors, detectors, etc.

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