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Suppression of terahertz dipole oscillation in split-ring resonators deformed from square to triangle

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Abstract

The evolution of terahertz resonance modes in an individual split-ring resonator (SRR) is investigated experimentally by locally structural deformation. The length reduction of opposite-side results in a frequency blueshift of resonance modes. Simultaneously, the Q factor of inductive–capacitive oscillation mode is enhanced while the dipole oscillation is suppressed. The numerical simulation indicates that the lateral-side and arms will take the place of opposite-side contributing to the dipole oscillation in deformed SRR. A further apex-angle increasing leads to a huge coupling loss so that the dipole oscillation is suppressed in right triangle SRR and obtuse triangle SRR.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 61307130) and the Joint Research Fund in Astronomy (Grant No. U1631112) under cooperative agreement between the National Natural Science Foundation of China (NSFC) and Chinese Academy of Sciences (CAS). Z.Z. acknowledges the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry as well as Innovation Program of Shanghai Municipal Education Commission (Grant No. 14YZ077). 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). Z.Z and X.Z contributed equally in this work.

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Authors and Affiliations

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

    Xiaobo Zheng, Zhenyu Zhao & 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 & Jianbing Zhang

  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. Wei Peng
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  4. Hongwei Zhao
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  5. Jianbing Zhang
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  7. Wangzhou Shi
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Correspondence to Zhenyu Zhao.

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Zheng, X., Zhao, Z., Peng, W. et al. Suppression of terahertz dipole oscillation in split-ring resonators deformed from square to triangle. Appl. Phys. A 123, 266 (2017). https://doi.org/10.1007/s00339-017-0904-7

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  • DOI: https://doi.org/10.1007/s00339-017-0904-7

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