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The Influence of Element Deformation on Terahertz Mode Interaction in Split-Ring Resonator-Based Meta-Atoms

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Abstract

The interaction between terahertz (THz) resonance modes and element deformation in rectangular split-ring resonator (RSRR)-based meta-atoms (MAs) is investigated experimentally. Two types of RSRR-based MAs are presented: lateral-varied SRR (LV-SRR) and arm-twisted SRR (AT-SRR). When the distances from the gaps to the opposite sides of above meta-atoms increase from 10 to 40 μm, the inductive-capacitive (LC) resonance modes and dipole oscillation modes exhibit redshift behavior. The quality factor (Q factor) of LC resonance decreases while that of dipole oscillation modes increases. The THz mode interaction is subject to the distance between the gap and opposite side. An extension of lateral side contributes much more to the enhancement of Q factor of dipole oscillation mode than the twisted arms. The relationship between the near-field coupling effect and THz modes is revealed by the analysis of surface currents as well as the electric energy density distribution, as is in agreement with the experimental results.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grants No. 61307130) and the Joint Research Fund in Astronomy (Grants No. U1631112) under cooperative agreement between the National Natural Science Foundation of China (NSFC) and Chinese Academy of Sciences (CAS) as well as the Innovation Program of Shanghai Municipal Education Commission (Grant No. 14YZ077). Z. Z. acknowledges the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry. W.P. acknowledges the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB04030000). Z. L. acknowledges the Project of Science and Technology Commission of Shanghai Municipality (Grant No. 16695840600).

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Authors and Affiliations

  1. Department of Physics, Shanghai Normal University, Shanghai, 200234, China

    Xiaobo Zheng, Zhenyu Zhao, Zhiqiang Song, Xiaoyong He & Wangzhou Shi

  2. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China

    Wei Peng

  3. Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    Hongwei Zhao

  4. Shanghai Key Laboratory for Astrophysics, Shanghai Normal University, Shanghai, 200234, China

    Zhijian Luo

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  1. Xiaobo Zheng
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  2. Zhenyu Zhao
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  3. Zhiqiang Song
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  4. Wei Peng
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  5. Hongwei Zhao
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  6. Xiaoyong He
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  7. Wangzhou Shi
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Correspondence to Zhenyu Zhao.

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Zheng, X., Zhao, Z., Song, Z. et al. The Influence of Element Deformation on Terahertz Mode Interaction in Split-Ring Resonator-Based Meta-Atoms. Plasmonics 12, 1391–1398 (2017). https://doi.org/10.1007/s11468-016-0398-8

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  • DOI: https://doi.org/10.1007/s11468-016-0398-8

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