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Controllable Terahertz Switch Using Toroidal Dipolar Mode of a Metamaterial

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Abstract

We present a controllable terahertz (THz) metamaterial switch by manipulating toroidal dipolar mode in simulation. The metamaterial switch consists of periodically patterned metallic split rings with photosensitive silicon stripes. The excitation of toroidal dipolar resonance is closely dependent on the transition between the dielectric and conductive phases of photosensitive silicon. The toroidal dipolar mode is exploited to modulate the ON/OFF-switching transmission of THz wave under wide incident angles. The operation mechanism and frequency tunability are discussed.

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Data Availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

The work was supported by Natural Science Foundation of Heilongjiang Province (LH2019F012); Fundamental Research Funds for the Central Universities to Harbin Engineering University (3072020CF2516); 111 Project of Harbin Engineering University (B13015).

Funding

The work was supported by Natural Science Foundation of Heilongjiang Province (LH2019F012); Fundamental Research Funds for the Central Universities to Harbin Engineering University (3072020CF2516); 111 Project of Harbin Engineering University (B13015).

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Authors and Affiliations

  1. Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, Harbin Engineering University, Harbin, 150001, China

    Tong Guo, Chen Chen, Ruoxing Wang & Li Li

  2. National Key Laboratory of Science and Technology On Tunable Laser, Harbin Institute of Technology, Harbin, 150080, China

    Fei Yan

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  1. Tong Guo
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  2. Chen Chen
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  3. Fei Yan
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  4. Ruoxing Wang
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  5. Li Li
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All authors have participated in (a) conception and design or analysis and interpretation of the data; (b) drafting the article or revising it critically for important intellectual content; and (c) approval of the final version.

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Correspondence to Ruoxing Wang or Li Li.

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Guo, T., Chen, C., Yan, F. et al. Controllable Terahertz Switch Using Toroidal Dipolar Mode of a Metamaterial. Plasmonics 16, 933–938 (2021). https://doi.org/10.1007/s11468-020-01359-5

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  • DOI: https://doi.org/10.1007/s11468-020-01359-5

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