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Formation mechanism and modulation of electromagnetically induced transparency-like transmission in side-coupled structures

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Abstract

Based on Fabry model and finite-different time-domain (FDTD) method, the plasmonic structure composed of a metal-insulator-metal (MIM) bus waveguide and a side-coupled resonator was investigated. It is found that the transmission features can be regulated by the cavity width and coupling distance. Electromagnetically induced transparency (EIT)-like transmission can be excited by adding an identical resonator on the pre-existing structure. Combining the foregoing theoretical analysis with coupled mode theory (CMT), the formation process of the EIT-like transmission was detailedly analyzed. EIT-like transmission can also be excited in plasmonic structure with two detuned resonators. By altering the structure parameters, the transparency window can be purposefully modulated. With the merits of compact structure and simplicity in fabrication, the proposed structures may have a broad prospect of applications in highly integrated optical circuits.

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Authors and Affiliations

  1. School of Physics and Electronics, Central South University, Changsha, 410083, China

    Hui Yang  (杨辉), Hong-jian Li  (李宏建), Xiu-ke Xu  (许秀科), Zhi-hui He  (何智慧), Yun Wang  (王云) & Guo-jun Xu  (徐国均)

  2. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Hong-jian Li  (李宏建)

Authors
  1. Hui Yang  (杨辉)
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  2. Hong-jian Li  (李宏建)
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  3. Xiu-ke Xu  (许秀科)
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  4. Zhi-hui He  (何智慧)
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  5. Yun Wang  (王云)
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  6. Guo-jun Xu  (徐国均)
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Corresponding author

Correspondence to Hong-jian Li  (李宏建).

Additional information

Foundation item: Project(61275174) supported by the National Natural Science Foundations of China; Project(20100162110068) supported by the Doctoral Program of Higher Education of China

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Yang, H., Li, Hj., Xu, Xk. et al. Formation mechanism and modulation of electromagnetically induced transparency-like transmission in side-coupled structures. J. Cent. South Univ. 22, 2020–2026 (2015). https://doi.org/10.1007/s11771-015-2724-2

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  • DOI: https://doi.org/10.1007/s11771-015-2724-2

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