留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Coplanar excitation of terahertz spoof surface plasmon and high-Q sensing

YAN De-xian CHENG Gang LI Er-ping LI Xiang-jun ZHANG Xue-ru WU Yi-lin

严德贤, 程钢, 李尔平, 李向军, 章雪茹, 吴依琳. 太赫兹人工表面等离子体共面激发与高Q传感[J]. 中国光学(中英文). doi: 10.37188/CO.2022-0204
引用本文: 严德贤, 程钢, 李尔平, 李向军, 章雪茹, 吴依琳. 太赫兹人工表面等离子体共面激发与高Q传感[J]. 中国光学(中英文). doi: 10.37188/CO.2022-0204
YAN De-xian, CHENG Gang, LI Er-ping, LI Xiang-jun, ZHANG Xue-ru, WU Yi-lin. Coplanar excitation of terahertz spoof surface plasmon and high-Q sensing[J]. Chinese Optics. doi: 10.37188/CO.2022-0204
Citation: YAN De-xian, CHENG Gang, LI Er-ping, LI Xiang-jun, ZHANG Xue-ru, WU Yi-lin. Coplanar excitation of terahertz spoof surface plasmon and high-Q sensing[J]. Chinese Optics. doi: 10.37188/CO.2022-0204

太赫兹人工表面等离子体共面激发与高Q传感

详细信息
  • 中图分类号: TP394.1; TH691.9

Coplanar excitation of terahertz spoof surface plasmon and high-Q sensing

doi: 10.37188/CO.2022-0204
Funds: Supported by National Key R&D Program of China (No. 2021YFF0600300); National Natural Science Foundation of China (No. 62001444); Natural Science Foundation of Zhejiang Province (No. LQ20F010009);
More Information
    Author Bio:

    严德贤(1991—),男,甘肃武威人,博士,副教授,2018年毕业于天津大学获博士学位,浙江大学博士后,主要从事太赫兹微波技术及器件。E-mail:yandexian1991@163.com

    李尔平(1962—),男,河北石家庄人,博士,浙江大学求是讲席教授、IEEE会士、国家特聘专家,英国谢菲尔德获电子与信息工程博士学位,主要从事电磁学、5G通信及芯片电磁兼容、等离子纳米光子学等领域研究。E-mail:liep@zju.edu.cn

    李向军(1976—),男,山西长治人,博士,副教授,2011年于浙江大学获得博士学位,主要从事太赫兹器件研究。E-mail:xiangjun_li@cjlu.edu.cn

    Corresponding author: liep@zju.edu.cn
  • 摘要:

    本文提出使用单层光栅超表面结构耦合的方式实现太赫兹人工表面等离子体激元(SSP)共面激发,克服了通过介质耦合器在实际应用时需要反射测量不便等缺点。在单层金属结构上同时构造周期性光栅和太赫兹SSP复合结构,当太赫兹波垂直入射时,实现光栅波矢和SSP波矢相匹配,激发SSP模式,在透射谱中可以产生高Q值谐振峰,其Q因子可以达到1923。分析了结构参数对光栅耦合超表面透射谱以及色散特性的影响。其次,基于该结构透射谱中的高Q谐振峰,进行传感研究,在谐振中心频率为0.22 THz时,实现传感灵敏度为67 GHz/RIU。本文所提出的光栅耦合超表面复合结构,仅仅使用单层超表面结构实现了太赫兹SSP模式的激发以及高Q传感,在诸多实际应用领域具有较大的研究潜力。

     

  • 图 1  基于光栅耦合实现太赫兹SSP的超表面结构。(a)光栅耦合SSP超表面结构图;(b)超表面单元结构示意图。

    Figure 1.  The meta-surface structure of the terahertz SSP based on grating coupling. (a) Diagram of the grating-coupled SSP meta-surface structure; (b) Schematic diagram of unit cell structure of the meta-surface.

    图 2  超表面结构及透射性能研究。(a)等效光栅耦合器结构示意图;(b)金属棒单元结构示意图;(c)结构参数a不同时所对应的透射谱;(d)结构参数a不同时对应的光栅及金属棒的色散关系。

    Figure 2.  Study on the meta-surface structure and transmission properties. (a) Schematic diagram of the equivalent grating coupler; (b) Schematic diagram of the metal bar unit; (c) Transmission spectrum corresponding to the different a; (d) Dispersion characteristics of the grating and metal bar with different a.

    图 3  不同结构参数对光栅耦合超表面结构透射特性的影响。(a)参数a不同时的透射谱;(b)参数b不同时的透射谱;(c)参数ab同时变化时的透射谱;(d)参数d不同时的透射谱。

    Figure 3.  Effects of different structural parameters on the transmission spectrum of grating-coupled meta-surface structures. (a) Transmission spectra with different a; (b) Transmission spectra with different b; (c) Transmission spectra with the simultaneous variation of a and b; (d) Transmission spectra with different d.

    图 4  改变结构参数对周期性金属结构色散特性的影响。(a)参数a不同时的色散特性;(b)参数b不同时的色散特性;(c)参数ab同时变化时的色散特性;(d)参数d不同时的色散特性。

    Figure 4.  Effects of structural parameters on the dispersion characteristics of periodic metal structures. (a) Dispersion characteristics with different a; (b) Dispersion characteristics with different b; (c) Dispersion characteristics with the simultaneous variation of a and b; (d) Dispersion characteristics with different d.

    图 5  (a)光栅耦合超表面结构实现人工表面等离子体电场分布图;(b)超表面结构的电场分布和表面电流分布。黑色箭头表示表面电流方向。

    Figure 5.  (a) Electric field distribution of the SSP modes realized by the grating-coupled meta-surface structure. (b) Electric field and surface current distributions of the meta-surface structure at resonant frequency. The black arrows indicate the surface current direction.

    图 6  改变光栅耦合超表面周围的环境折射率所得到的透射率变化以及相应的传感灵敏度。(a)不同折射率所对应的透射谱;(b)计算得到的传感灵敏度。

    Figure 6.  Changes in transmissivity and corresponding sensing sensitivity obtained by varying the ambient refractive index around the grating-coupled meta-surface. (a) Transmission spectra with different refractive indices; (b) The calculated sensing sensitivity.

  • [1] SUN SH L, HE Q, HAO J M, et al. Electromagnetic metasurfaces: physics and applications[J]. Advances in Optics and Photonics, 2019, 11(2): 380-479. doi: 10.1364/AOP.11.000380
    [2] LIU Q, JIANG Y, HU CH J, et al. . High-sensitivity surface plasmon resonance sensor based on the ten-fold eccentric core quasi-D-shaped photonic quasi-crystal fiber coated with indium tin oxide[J]. Chinese Optics, 2022, 15(1): 101-110. (查阅所有网上资料, 本条文献为英文文献, 请核对)
    [3] ZHU Y CH, YUAN W ZH, YU Y T. Planar plasmonic lenses and their applications[J]. Chinese Optics, 2017, 10(2): 149-163. (in Chinese) doi: 10.3788/co.20171002.0149
    [4] LIU Y Q, LI L SH, YIN H CH. Long-range spoof surface plasmons (LRSSP) on the asymmetric double metal gratings[J]. IEEE Photonics Journal, 2021, 13(2): 4800209.
    [5] YAO H Z, ZHANG W W, LIU W F, et al. Resolved terahertz spectroscopy of tiny molecules employing tunable spoof plasmons in an otto prism configuration[J]. Journal of Optics, 2022, 24(4): 045301. doi: 10.1088/2040-8986/ac5537
    [6] BAI Y K, LIU S. A novel dual-beam terahertz leaky-wave antenna based on spoof surface Plasmon waveguide[J]. Optoelectronics Letters, 2022, 18(7): 404-407. doi: 10.1007/s11801-022-1151-5
    [7] GAO ZH, WU L, GAO F, et al. Spoof plasmonics: from metamaterial concept to topological description[J]. Advanced Materials, 2018, 30(31): 1706683. doi: 10.1002/adma.201706683
    [8] TANG H H, MA T J, LIU P K. Experimental demonstration of ultra-wideband and high-efficiency terahertz spoof surface Plasmon polaritons coupler[J]. Applied Physics Letters, 2016, 108(19): 191903. doi: 10.1063/1.4948928
    [9] LI X J, CHENG G, YAN D X, et al. One-dimensional terahertz dielectric gradient metasurface for broadband spoof surface Plasmon polaritons couplers[J]. Optics Letters, 2021, 46(2): 290-293. doi: 10.1364/OL.412229
    [10] YIN L ZH, HUANG T J, WANG D, et al. Terahertz dual phase gradient metasurfaces: high-efficiency binary-channel spoof surface Plasmon excitation[J]. Optics Letters, 2020, 45(2): 411-414. doi: 10.1364/OL.380771
    [11] YAN D X, LI X J, MA CH, et al. Terahertz refractive index sensing based on gradient Metasurface coupled confined spoof surface Plasmon Polaritons mode[J]. IEEE Sensors Journal, 2022, 22(1): 324-329. doi: 10.1109/JSEN.2021.3130266
    [12] LI X J, WANG L Y, CHENG G, et al. Terahertz spoof surface Plasmon sensing based on dielectric metagrating coupling[J]. APL Materials, 2021, 9(5): 051118. doi: 10.1063/5.0048491
    [13] SUN SH L, HE Q, XIAO SH Y, et al. Gradient-index meta-surfaces as a bridge linking propagating waves and surface waves[J]. Nature Materials, 2012, 11(5): 426-431. doi: 10.1038/nmat3292
    [14] MENG Y Y, MA H, WANG J F, et al. Broadband spoof surface Plasmon polaritons coupler based on dispersion engineering of metamaterials[J]. Applied Physics Letters, 2017, 111(15): 151904. doi: 10.1063/1.4995505
    [15] CHEN X, FAN W H. Ultrasensitive terahertz metamaterial sensor based on spoof surface Plasmon[J]. Scientific Reports, 2017, 7(1): 2092. doi: 10.1038/s41598-017-01781-6
    [16] NG B, WU J F, HANHAM S M, et al. Spoof Plasmon surfaces: a novel platform for THz sensing[J]. Advanced Optical Materials, 2013, 1(8): 543-548. doi: 10.1002/adom.201300146
    [17] NG B, HANHAM S M, WU J F, et al. Broadband terahertz sensing on spoof Plasmon surfaces[J]. ACS Photonics, 2014, 1(10): 1059-1067. doi: 10.1021/ph500272n
    [18] HUANG Y, ZHONG SH C, SHI T T, et al. Terahertz plasmonic phase-jump manipulator for liquid sensing[J]. Nanophotonics, 2020, 9(9): 3011-3021. doi: 10.1515/nanoph-2020-0247
    [19] SATHUKARN A, YI C H, BOONRUANG S, et al. The simulation of a surface Plasmon resonance metallic grating for maximizing THz sensitivity in refractive index sensor application[J]. International Journal of Optics, 2020, 2020: 3138725.
    [20] CHEN L, YIN H H, CHEN L, et al. Ultra-sensitive fluid fill height sensing based on spoof surface Plasmon polaritons[J]. Journal of Electromagnetic Waves and Applications, 2018, 32(4): 471-482. doi: 10.1080/09205071.2017.1395367
    [21] YIN L ZH, HUANG T J, HAN F Y, et al. High-efficiency terahertz spin-decoupled meta-coupler for spoof surface Plasmon excitation and beam steering[J]. Optics Express, 2019, 27(13): 18928-18939. doi: 10.1364/OE.27.018928
    [22] HAN ZH H, ZHANG Y SH, BOZHEVOLNYI S I. Spoof surface Plasmon-based stripe antennas with extreme field enhancement in the terahertz regime[J]. Optics Letters, 2015, 40(11): 2533-2536. doi: 10.1364/OL.40.002533
  • 加载中
图(6)
计量
  • 文章访问数:  113
  • HTML全文浏览量:  67
  • PDF下载量:  165
  • 被引次数: 0
出版历程
  • 网络出版日期:  2022-11-22

目录

    /

    返回文章
    返回