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Terahertz Plasmonic Microcavity with High Quality Factor and Ultrasmall Mode Volume

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Abstract

In this paper, the characteristics of a novel terahertz plasmonic microcavity consisting of a circular hole and a coaxial (metallic) cylindrical core machined on a planar metal surface is theoretically investigated. It is shown that such a structure can sustain plasmonic modes, whose resonant wavelengths are much larger than the hole diameter and fields tightly localized within the cavity. For this cavity, both high quality factor and ultrasmall mode volume can be achieved in the terahertz range. As this type of microcavity is particularly compatible with planar technology, it has promising applications in the miniaturization and integration of terahertz optical components.

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Acknowledgements

This work was supported by the National Natural Science Foundations of China under grant numbers 60971062 and 60971059 and by the National Science Council of ROC under grant numbers NSC 100-2112-M-216 -002 and NSC 100-2221-E-216 -015.

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Authors and Affiliations

  1. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, People’s Republic of China

    Zhen Gao, Linfang Shen & Dongxiao Yang

  2. Department of Optical Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, People’s Republic of China

    Xiaodong Zheng

  3. Department of Electrical Engineering, Chung Hua University, HsinChu, 30012, Taiwan, Republic of China

    Jin-Jei Wu & Tzong-Jer Yang

Authors
  1. Zhen Gao
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  2. Linfang Shen
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  3. Xiaodong Zheng
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  4. Jin-Jei Wu
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  5. Tzong-Jer Yang
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  6. Dongxiao Yang
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Corresponding author

Correspondence to Xiaodong Zheng.

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Gao, Z., Shen, L., Zheng, X. et al. Terahertz Plasmonic Microcavity with High Quality Factor and Ultrasmall Mode Volume. Plasmonics 8, 319–324 (2013). https://doi.org/10.1007/s11468-012-9392-y

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  • DOI: https://doi.org/10.1007/s11468-012-9392-y

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