Tunable metamaterial absorber based on resonant strontium titanate artificial atoms
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第3期
论文作者：Xiaoming Liu Zhiyu Ren Tian Yang Luping Chen Qiang Wang Ji Zhou
摘 要：Dynamic control of the absorption frequency and intensity of metamaterial absorbers has attracted considerable attention,and many kinds of tunable metamaterial absorbers have been proposed.Unfortunately,due to the integration of separate resonant unit and tunable unit,these designed metamaterial absorbers suffer from complex structure and low sensitivity.We numerically and experimentally demonstrate a tunable metamaterial absorber composed of artificial dielectric atoms as both resonant and tunable unit arrayed periodically in the background matrix on the metallic plate.Polarization insensitive and wide incident angle absorption band with simulated and experimental absorptivity of 99 % and 96 % at 9.65 GHz are achieved at room temperature.The absorption frequency can be gradually modulated by temperature,however,the absorption intensity at working frequency remains near unity.The dielectric atoms based tunable metamaterial absorbers with simple structure have potential applications as tempe rature sensors and frequency selective thermal emitters.
Xiaoming Liu1,2，Zhiyu Ren1,2，Tian Yang3，Luping Chen2,4，Qiang Wang1,2，Ji Zhou5
1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University2. Department of New Energy Science & Engineering,School of Metallurgy, Northeastern University3. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science andEngineering, Tsinghua University4. State Key Laboratory of Rolling and Automation,Northeastern University5. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
摘 要：Dynamic control of the absorption frequency and intensity of metamaterial absorbers has attracted considerable attention,and many kinds of tunable metamaterial absorbers have been proposed.Unfortunately,due to the integration of separate resonant unit and tunable unit,these designed metamaterial absorbers suffer from complex structure and low sensitivity.We numerically and experimentally demonstrate a tunable metamaterial absorber composed of artificial dielectric atoms as both resonant and tunable unit arrayed periodically in the background matrix on the metallic plate.Polarization insensitive and wide incident angle absorption band with simulated and experimental absorptivity of 99 % and 96 % at 9.65 GHz are achieved at room temperature.The absorption frequency can be gradually modulated by temperature,however,the absorption intensity at working frequency remains near unity.The dielectric atoms based tunable metamaterial absorbers with simple structure have potential applications as tempe rature sensors and frequency selective thermal emitters.
关键词：
