Abstract
A metamaterial system composed of monolayer black phosphorus and Au triangle arrays is designed. Absorptivity, transmittivity, and reflectivity are investigated in mid-infrared regime. A low transmissivity and high absorptivity can be obtained via surface plasmon polaritons at the black phosphorus and Au triangle array interface. By changing the geometrical parameters, such as angle magnitude and slit width of Au triangle, we can modulate the transmissivity, reflectivity and absorptivity properties. Different from other previous work, it is found the zigzag direction has a better photoresponse than that armchair by changing the slit width. The electric field of the external radiation field is reflected at the Au triangle edges. Thus, electric field component perpendicular to the polarization direction generates, which can also lead to surface plasmon polaritons and is not researched in others’ work. With increase in the angle of Au triangle, transmittivity (or absorptivity) for armchair direction has a blue shift and for zigzag direction has a red shift. The transmittivity decrease ( or absorptivity increase ) for special wavelength caused by the surface plasmon polaritons may be applied to design filter devices.
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All data generated or analyzed during this study are included in this published article.
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The data in this paper are obtained by using the commercial software FDTD Solutions (Version: 8.19).
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11847029, 11604192), Doctoral Scientific Research Foundation of Jining Medical University (No. 2018JYQD06), Scientific and Technological Research Projects of Higher Education Institutions in Hebei Province (Grant No. QN2019139), Natural Science Foundation of Hebei Province (Grant No. B2020205018), and Applied Basic Research Project of Shanxi Province (Grant No. 201801D221113).
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This work was mainly supported by the National Natural Science Foundation of China ( Grant No. 11847029 ).
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Fangwei Han contributed to the conception of the study; Borong Yu, Fanbin Meng, Chengxiang Zhao contributed significantly to analysis and manuscript perparation; Lizhe Zhou helped perform the analysis with constructive discussions.
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Han, F., Yu, B., Meng, F. et al. Tunable Mid-Infrared Optical Properties of Monolayer Black Phosphorus Through Au Nanotriangle Arrays via Electric Field Reflection and Surface Plasmon Polaritons. Plasmonics 16, 1729–1734 (2021). https://doi.org/10.1007/s11468-021-01426-5
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DOI: https://doi.org/10.1007/s11468-021-01426-5