基于类电磁诱导透明的超材料的传感特性研究
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摘要
理论和实验研究了一种由闭合方环(CSRR)和开口圆环(SRR)组合的具有类电磁诱导透明(EIT-like)效应的超材料谐振器。结果表明,该谐振器在0.64 THz附近的透明峰是由CSRR的电谐振和SRR的磁谐振干涉相消引起的;基底损耗对透射峰强度的影响很大;实验验证了该谐振器透射谱和模拟结果基本一致;类电磁诱导谐振峰对周围固体介质折射率变化具有很高的灵敏度,其值达到188 GHz/RIU,该谐振器还能分辨不同浓度的乙醇溶液。
A metamaterial resonator with electromagnetic-induced transparency(EIT) was studied theoretically and experimentally,which was composed of a split resonant ring(SRR) and a closed square resonant ring(CSRR).The results show that the transparency peak near 0.64 THz is caused by the simultaneous elimination of electrical resonance and magnetic resonance interference between the SRR and CSRR.The resonator has a high sensitivity which is up to 188 GHz/RIU to the refractive index change of the surrounding media;The resonator can distinguish different concentrations of ethanol solution.The experimental results show that the transmission spectrum of the resonator is basically consistent with the simulation results.
A metamaterial resonator with electromagnetic-induced transparency(EIT) was studied theoretically and experimentally,which was composed of a split resonant ring(SRR) and a closed square resonant ring(CSRR).The results show that the transparency peak near 0.64 THz is caused by the simultaneous elimination of electrical resonance and magnetic resonance interference between the SRR and CSRR.The resonator has a high sensitivity which is up to 188 GHz/RIU to the refractive index change of the surrounding media;The resonator can distinguish different concentrations of ethanol solution.The experimental results show that the transmission spectrum of the resonator is basically consistent with the simulation results.
引文
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[6]Hao J,Wang J,Liu X,et al.High performance optical absorber based on a plasmonic metamaterial [J].Applied Physics Letters,2014,96(25):251104.
[7]Ding F,Cui Y,Ge X,et al.Ultra-broadband microwave metamaterial absorber [J].Applied Physics Letters,2012,100(10):103506.
[8]Kevin B,Mosallaei H,Sarabandi K,et al.A substrate for small patch antennas providing tunable miniaturization factors [J].IEEE Transactions on Microwave Theory and Techniques,2006,54(1):135-146.
[9]Dong Y,Toyao H,Itoh T,et al.Compact circularly-polarized patch antenna loaded with metamaterial structures [J].IEEE Transactions on Antennas and Propagation,2011,59(11):4329-4333.
[10]Alù A,Bilotti F,Engheta N,et al.Subwavelength,compact,resonant patch antennas loaded with metamaterials [J].IEEE Transactions on Antennas and Propagation,2007,55(1):13-25.
[11]Ouedraogo R O,Rothwell E J,Diaz A R,et al.Miniaturization of patch antennas using a metamaterial-inspired technique [J].IEEE Transactions on Antennas and Propagation,2012,60(5):2175-2182.
[12]Chiam S Y,Singh R,Zhang W,et al.Controlling metamaterial resonances via dielectric and aspect ratio effects[J].Applied Physics Letters,2010,97(19):191906.
[13]Wu P C,Hsu W L,Chen W T,et al.Plasmon coupling in vertical split-ring resonator metamolecules [J].Scientific Reports,2015(5):9726.
[14]Zhang S,Genov D A,Wang Y,et al.Plasmon-induced transparency in metamaterials [J].Physical Review Letters,2008,101(4):047401.
[15]Liu X,Gu J,Singh R,et al.Electromagnetically induced transparency in terahertz plasmonic metamaterials via dual excitation pathways of the dark mode [J].Applied Physics Letters,2012,100(13):131101.
[16]Zhu Z,Yang X,Gu J,et al.Broadband plasmon induced transparency in terahertz metamaterials [J].Nanotechnology,2013,24(21):214003.
[17]Zhang K,Wang C,Qin L,et al.Dual-mode electromagnetically induced transparency and slow light in a terahertz metamaterial [J].Optics Letters,2014,39(12):3539-3542.
[18]Liang D,Zhang H,Gu J,et al.Plasmonic analogue of electromagneticlly induced transparency in stereo metamaterials [J].IEEE Journal of Selected Topics in Quantum Electronics,2017,23(4):1-7.
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[21]Yan X,Liang L J,Ding X,et al.Solid analyte and aqueous solutions sensing based on a flexible terahertz dual-band metamaterial absorber[J].Optical Engineering,2017,56(2):027104.