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Tunable Electromagnetically Induced Transparency-Like in Plasmonic Stub Waveguide with Cross Resonator

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Abstract

An analog of electromagnetically induced transparency (EIT) is investigated in a metal-insulator-metal (MIM) waveguide structure consisting of a stub waveguide and a side-coupled cross resonator. The transmission properties of this plasmonic MIM waveguide structure are numerically studied by the finite element method. The results show that there are double EIT-like phenomena as well as multiple EIT-like peaks in the transmission spectra by adding another stub. The transparency windows not only can be manipulated by changing the coupling distance between the stub and the cross resonator and the length of the horizontal and vertical cavity but also show a red shift with the increase of the refractive index n of the medium in the cross resonator. The designed plasmonic MIM waveguide structure is able to serve as a filter with a transmission rate of over 80 % and is easy to detect the refractive index of the filled media in the cross resonator, which indicates the potential applications in filtering and sensing.

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Acknowledgments

This work was supported by the National Natural Foundation of China (Nos. 11304243 and 11604198), the National Science Basic Research Plan in Shaanxi Province of China (Nos. 2013JM8004 and 2014JQ1039), the Cultivating Fund in Xi’an University of Science and Technology (No. 201242), and the Xi’an University of Science and Technology, Dr. Scientific Research Fund (No. 2015QDJ011).

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Authors and Affiliations

  1. School of science, Xi’an University of Science and Technology, Xi’an, 710054, China

    Shaofang Pang, You Xie & Limei Hao

  2. School of Physics and Information technology, Shaanxi Normal University, Xi’an, 710062, China

    Yiping Huo

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  1. Shaofang Pang
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  2. Yiping Huo
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  3. You Xie
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  4. Limei Hao
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Correspondence to Shaofang Pang.

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Funding

This study was funded by the National Natural Foundation of China ( Nos. 11304243 and 11604198), the National Science Basic Research Plan in Shaanxi Province of China (Nos. 2013JM8004 and 2014JQ1039), the Cultivating Fund in Xi’an University of Science and Technology (201242), and the Xi’an University of Science and Technology, Dr. Scientific Research Fund (No. 2015QDJ011).

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The authors declare that they have no conflict of interest.

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Pang, S., Huo, Y., Xie, Y. et al. Tunable Electromagnetically Induced Transparency-Like in Plasmonic Stub Waveguide with Cross Resonator. Plasmonics 12, 1161–1168 (2017). https://doi.org/10.1007/s11468-016-0371-6

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  • DOI: https://doi.org/10.1007/s11468-016-0371-6

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