Tunable Metamaterials Based on Nematic Liquid Crystals
Electrically tunable negative permeability metamaterial consisting of periodic array of split ring resonators (SRRs) infiltrated with nematic liquid crystals is demonstrated. Transmission measurement shows that the transmitted resonance dip of the metamaterial shifts towards low frequency as the applied effectric field increases. The maximum shift is about 210MHz and the shift can be continuously and reversible adjusted. Numerical simulation shows that the permeability of the metamaterial is negative near the resonance frequency and the frequency range with negative permeability can be dynamically adjusted and widen about 200MHz by the applied effectric field. An applied effectric field changes the alignment of the liquid crystal directors and hence the dieffectric constant of the structure, which permits dynamically tuning the negative permeability and provides a convenient means to add adaptive features to the metamaterials.
Qian Zhao Lei Kang Bo Du Bo Li Ji Zhou
State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering Tsinghua University, Beijing 100084, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
302-305
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）