GUO Han,MA Wenying,MA Changwei,et al.THz Resonator based on Absorbing Structure and its Sensing Characteristics[J].Journal of Chengdu University of Information Technology,2020,35(02):134-138.[doi:10.16836/j.cnki.jcuit.2020.02.002]
基于吸波结构的THz谐振器及其传感特性
- Title:
- THz Resonator based on Absorbing Structure and its Sensing Characteristics
- 文章编号:
- 2096-1618(2020)02-0134-05
- Keywords:
- terahertz; absorbing structure; resonator; sensing characteristics
- 分类号:
- TP212
- 文献标志码:
- A
- 摘要:
- 设计了一种基于吸波结构的THz谐振器。该结构单元由三开口金属谐振环、有损绝缘基板及连续金属膜组成,分别对FR4材料基板以及PI基板的THz谐振器进行仿真,分析了两种介质损耗不同的中间层基板对THz谐振器的吸收率及品质因数的影响。结果表明,选用较低介质损耗的PI材料作为中间层基板的THz谐振器,其欧姆损耗吸波效应更明显,吸波峰较选用较高介质损耗的材料作为中间层基板的THz谐振器有所频移,吸收率有所衰减,而Q值、灵敏度、FOM值更高。通过优化,在0.982 THz附近得到一个3 dB带宽约为6.88 GHz的吸波谱,相应的Q值为142.73,其吸收率为0.936。最后对THz谐振器的传感特性进行了测量,其折射率灵敏度为48.21 GHz/RIU,FOM值为7.01/RIU,具有较高的传感特性。
- Abstract:
- A THz resonator based on absorbing structure is designed in the paper. The structure unit consists of three open metal resonant rings, lossy insulating substrates and continuous metal films. The THz absorbing structure resonators based on FR4 substrates and PI substrates are simulated respectively. The effects of two substrates with different dielectric losses on the absorptivity and quality factor are analyzed. The results show that the THz resonator with lower dielectric loss has more obvious ohmic absorption effect than that with higher dielectric loss. The absorption peak of THz resonator with lower dielectric loss is blue-shifted and the absorption rate is attenuated, while the Q value, sensitivity and FOM value are higher. By optimization, a 3 dB bandwidth of 6.88 GHz is obtained near 0.982 THz, and the corresponding Q value is 142.73,with an absorptivity of 0.936.Finally,the sensing characteristics of THz resonator are measured.Its refractive index sensitivity is 48.21 GHz/RIU,FOM value is 7.01/RIU, and it has high sensing characteristics.
参考文献/References:
[1] 赵德林,宋耀良,朱艳萍.一种新的基于谐振型高阻抗表面的微波吸波屏[J].南京理工大学学报(自然科学版),2010,34(1):136-140.
[2] Landy N,Sajuyigbe S,Mock J,et al.A Perfect Metematerial Absorber[J].Physical review letters,2008,100:207402.
[3] Tao H,Landy N I,Bingham C M,et al.A metamaterial absorber for the terahertz regime:Design,fabrication and charcterization[J].Optics Express,2008,16:7181.
[4] Landy N I,Bingham C M,Tyler T,et al.Design,theory,and measurement of a polarization insensitive absorber for terahertz imaging[J]. Physical Review B,2009,79:125-104.
[5] Tao H,Bingham C M,Strikwerda A,et al.Hignly Flexible Wide Angle of Incidence Terahertz Metamaterial Absorber:Design,Fabrication and Characterization[J].Physical Review B,2008,78(24):231-103.
[6] 孙雅茹,史同璐,刘建军,等.太赫兹超材料类EIT谐振无标记生物传感[J].光学学报,2016,36(3):261-266.
[7] 郑伟,范飞,陈猛,等.基于太赫兹超材料的微流体折射率传感器[J].红外与激光工程,2017,46(4):123-128.
[8] 杨利其,梁兰菊,刘凤收,等.基于太赫兹超材料吸波体的谐振及传感特性研究[J].激光杂志,2018,39(11):62-65.
[9] 高军,张浩,曹祥玉,等.一种双频超薄吸波结构在微带天线中的应用[J].西安电子科技大学学报,2015,42(1):130-135.
[10] Zuo W,Yang Y,Xiao Xi H E,et al.An ultra-wideband miniaturized metamaterial absorber in the ultrahigh frequency range[J].IEEE Antennas & Wireless Propagation Letters,2017,16:928-931.
[11] Wang L,Jiang Y,Wang J,et al.An ultra-broadband THz absorber based on graphene[C].International Symposium on Antennas, Propagation and Em Theory,2017,[S.l.]:IEEE,699-702.
[12] Costa F,Monorchio A.A frequency selective radome with wideband absorbing properties [J]. IEEE Transactions on Antennas & Propagation,2012,60(6):2740-2747.
[13] Pan W,Yu X,Zhang J,et al.A broadband terahertz metamaterial absorber based on two circular split rings [J].IEEE Journal of Quantum Electronics,2017,53(1):1-6.
[14] Chen J,Hu Z, Wang G,et al.High-impedance surfacebased broadband absorbers with interference theory[J].IEEE Transactions on Antennas & Propagation,2015,63(10):4367-4374.
[15] Yoo M,Lim S.Polarization-independent and broadband metamaterial absorber using a hexagonal artificial impedance surface and a resistor-capacitor layer, IEEE Transaction[J].Antennas & Propagation,2014,62(5):2652-2658.
备注/Memo
收稿日期:2019-10-10 基金项目:四川省科技计划资助项目(2017JY0332); 四川省科技创新苗子工程资助项目(2017097)