{"title":"基于石墨烯贴片的三频/超宽带可切换太赫兹超材料吸收器","authors":"Yulong Liu, Zhongyin Xiao, Xianshun Cai, Qi Zheng","doi":"10.1007/s11664-024-11348-7","DOIUrl":null,"url":null,"abstract":"<p>A tri-band/ultra-broadband switchable terahertz absorber based on graphene patches is proposed in this paper. By changing the bias voltage of the graphene patches, the operating modes of the absorber can be switched between tri-band and ultra-broadband absorption. The simulation results show that the absorption bandwidth can reach 6.34 THz when the mode is ultra-broadband absorption, and the relative bandwidth is 159.3%. The absorption bandwidths can reach 0.73 THz, 0.74 THz, and 0.59 THz, respectively, when the mode is tri-band absorption, and perfect absorption appears at 1.12 THz, 4.12 THz, and 6.86 THz. The absorptance within the absorption bands can exceed 90% in both modes. In addition, the absorber is characterized by polarization insensitivity, and it can maintain high absorptance of greater than 90% with an incidence angle below 40°. The physical mechanisms of the proposed absorber are analyzed by electric field distribution and equivalent circuit theory. We believe the absorber is a potential candidate for terahertz 6G communication and electromagnetic stealth.</p>","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"58 1","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tri-Band/Ultra-Broadband Switchable Terahertz Metamaterial Absorber Based on Graphene Patches\",\"authors\":\"Yulong Liu, Zhongyin Xiao, Xianshun Cai, Qi Zheng\",\"doi\":\"10.1007/s11664-024-11348-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>A tri-band/ultra-broadband switchable terahertz absorber based on graphene patches is proposed in this paper. By changing the bias voltage of the graphene patches, the operating modes of the absorber can be switched between tri-band and ultra-broadband absorption. The simulation results show that the absorption bandwidth can reach 6.34 THz when the mode is ultra-broadband absorption, and the relative bandwidth is 159.3%. The absorption bandwidths can reach 0.73 THz, 0.74 THz, and 0.59 THz, respectively, when the mode is tri-band absorption, and perfect absorption appears at 1.12 THz, 4.12 THz, and 6.86 THz. The absorptance within the absorption bands can exceed 90% in both modes. In addition, the absorber is characterized by polarization insensitivity, and it can maintain high absorptance of greater than 90% with an incidence angle below 40°. The physical mechanisms of the proposed absorber are analyzed by electric field distribution and equivalent circuit theory. We believe the absorber is a potential candidate for terahertz 6G communication and electromagnetic stealth.</p>\",\"PeriodicalId\":626,\"journal\":{\"name\":\"Journal of Electronic Materials\",\"volume\":\"58 1\",\"pages\":\"\"},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2024-08-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Electronic Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s11664-024-11348-7\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electronic Materials","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s11664-024-11348-7","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Tri-Band/Ultra-Broadband Switchable Terahertz Metamaterial Absorber Based on Graphene Patches
A tri-band/ultra-broadband switchable terahertz absorber based on graphene patches is proposed in this paper. By changing the bias voltage of the graphene patches, the operating modes of the absorber can be switched between tri-band and ultra-broadband absorption. The simulation results show that the absorption bandwidth can reach 6.34 THz when the mode is ultra-broadband absorption, and the relative bandwidth is 159.3%. The absorption bandwidths can reach 0.73 THz, 0.74 THz, and 0.59 THz, respectively, when the mode is tri-band absorption, and perfect absorption appears at 1.12 THz, 4.12 THz, and 6.86 THz. The absorptance within the absorption bands can exceed 90% in both modes. In addition, the absorber is characterized by polarization insensitivity, and it can maintain high absorptance of greater than 90% with an incidence angle below 40°. The physical mechanisms of the proposed absorber are analyzed by electric field distribution and equivalent circuit theory. We believe the absorber is a potential candidate for terahertz 6G communication and electromagnetic stealth.
期刊介绍：
The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications.
Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field.
A journal of The Minerals, Metals & Materials Society.
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