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Coupling Between Metamolecular Modes and Lattice Diffraction Modes of Metamaterials in Terahertz Region

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Abstract

The coupling between plasmonic modes and lattice diffraction modes of circular split-ring resonators in terahertz (THz) region has been analyzed by changing the lattice constants. We discovered a blue shift of the individual eigenmode in short lattice constants, which is due to the longitudinal coupling of two adjacent eigenmodes from neighboring unit cells. We found an anti-crossing effect in long lattice constants for both TM and TE incidence as the lattice diffraction modes is fused with the plasmonic modes to form hybrid modes. Moreover, these hybrid modes are more sensitive to the refractive index change than the pure modes, which shows the promise to increase the sensitivity of metamaterials by coupling.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (No. 11374240) and Guangxi Key Laboratory of Automatic Detecting Technology and Instruments (YQ17201).

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Authors and Affiliations

  1. Shaanxi Joint Lab of Graphene, State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics & Photon-Technology, Northwest University, Xi’an, 710069, China

    Leilei Yu, Qian Wang, Yuanyuan Huang, Changji Liu, Longhui Zhang & Xinlong Xu

  2. Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, 541004, People’s Republic of China

    Fangrong Hu & Xinlong Xu

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  1. Leilei Yu
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  2. Qian Wang
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  3. Fangrong Hu
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  4. Yuanyuan Huang
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  5. Changji Liu
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  6. Longhui Zhang
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  7. Xinlong Xu
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Correspondence to Xinlong Xu.

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Yu, L., Wang, Q., Hu, F. et al. Coupling Between Metamolecular Modes and Lattice Diffraction Modes of Metamaterials in Terahertz Region. Plasmonics 13, 961–969 (2018). https://doi.org/10.1007/s11468-017-0594-1

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  • DOI: https://doi.org/10.1007/s11468-017-0594-1

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