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Broadband field enhancement of THz electromagnetic wave by surface-textured micron PVDF cylinders

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Abstract

A cylindrical dimmer system is proposed to realize broadband field enhancement for terahertz (THz) electromagnetic wave. A surface-textured crescent-shaped cylinder is proposed to red-shift the absorption spectrum comparing to the traditional crescent-shaped cylinder based on the concept of spoof surface plasmons. Such cylinders made of ferroelectric polyvinylidene fluoride can realize the electromagnetic wave harvesting at terahertz frequencies with a broadband and huge absorption cross section. Two such cylinders in close proximity could achieve considerable electromagnetic field enhancement and field confinement in the gap, which could be applied in THz molecules detection, toxic chemical sensing, and safety screening and could break the detection binding that limits the molecules <100 nm.

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Acknowledgments

The authors thank the National Natural Science Foundation of China (Grant No. 61275130) for financial support. The authors also thank Dr. Jun Zheng and Prof. Zhengming Sheng in Shanghai Jiaotong University for their help in numerical simulations.

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Authors and Affiliations

  1. Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing, 100875, People’s Republic of China

    Xinxin Li, Xuan Liu, Luoning Zhang, Jing Zhou & Dahe Liu

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  1. Xinxin Li
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  2. Xuan Liu
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  3. Luoning Zhang
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  4. Jing Zhou
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  5. Dahe Liu
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Correspondence to Jing Zhou.

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Li, X., Liu, X., Zhang, L. et al. Broadband field enhancement of THz electromagnetic wave by surface-textured micron PVDF cylinders. Appl. Phys. B 120, 167–170 (2015). https://doi.org/10.1007/s00340-015-6120-2

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  • DOI: https://doi.org/10.1007/s00340-015-6120-2

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