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Staked Graphene for Tunable Terahertz Absorber with Customized Bandwidth

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Abstract

Terahertz (THz) absorber with dynamically tunable bandwidth possesses huge application value in the fields of switches, sensors, and THz detection. However, the perfect absorbers based on photonic crystals and metamaterials are not intelligent enough to capture the electromagnetic wave in a tunable way. In this paper, we utilized only patterned graphene to tune the absorption positions and the bandwidth in the terahertz regime. More distinguished than some dynamic absorbers proposed before, the performances with peak frequency relative tuning range of 68 % and nearly unity absorbance are obtained by a single cross-shaped graphene layer. Additionally, the working bandwidth can be broadened with stacked structured graphene. The almost perfect absorption shifted from 2.36∼3.2 to 3.26∼3.99 THz continuously via changing the chemical potential of graphene.

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Acknowledgments

This work was supported by 973 Program of China (no. 2013CBA01700) and National Natural Science Funds (nos. 61138002 and 61575201).

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    Authors and Affiliations

    1. State Key Lab of Optical Technology for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Science, Chengdu, 610029, China

      Yanqin Wang, Maowen Song, Mingbo Pu, Yu Gu, Chenggang Hu, Zeyu Zhao, Changtao Wang & Xiangang Luo

    2. Key Lab of Optoelectronic Technology and Systems of Education Ministry of China, Chongqing University, Chongqing, 400044, China

      Maowen Song & Honglin Yu

    Authors
    1. Yanqin Wang
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    2. Maowen Song
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    3. Mingbo Pu
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    4. Yu Gu
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    5. Chenggang Hu
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    6. Zeyu Zhao
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    7. Changtao Wang
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    8. Honglin Yu
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    9. Xiangang Luo
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    Correspondence to Xiangang Luo.

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    Yanqin Wang and Maowen Song contributed equally to this work.

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    Wang, Y., Song, M., Pu, M. et al. Staked Graphene for Tunable Terahertz Absorber with Customized Bandwidth. Plasmonics 11, 1201–1206 (2016). https://doi.org/10.1007/s11468-015-0162-5

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    • DOI: https://doi.org/10.1007/s11468-015-0162-5

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