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Issue 43, 2019
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Independent tunable multi-band absorbers based on molybdenum disulfide metasurfaces

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Abstract

In this paper, we theoretically and numerically demonstrate a dual-band independently adjustable absorber comprising an array of stacked molybdenum disulfide (MoS2) coaxial nanodisks and a gold reflector that are separated by two dielectric insulating layers. The array plane functionality is explained by the dipole resonances with the MoS2 nanodisks. As a result, strong absorption is achieved at a wide range of incident angles under TE and TM polarizations. The structural parameters of the entire array and the carrier concentration in the MoS2 layers were varied to get the optimized absorption. The absorptance positioning can be adjusted by scaling the diameters of the MoS2 disks. We also proposed the array modification where nanodisks are replaced by a layer with nanoholes. The position of both absorptance peaks can be adjusted individually by changing the carrier concentration in the array. This structure can be useful for the design of chemical sensors, detectors or multi-band absorbers.

Graphical abstract: Independent tunable multi-band absorbers based on molybdenum disulfide metasurfaces

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Article information


Submitted
12 Sep 2019
Accepted
17 Oct 2019
First published
18 Oct 2019

Phys. Chem. Chem. Phys., 2019,21, 24132-24138
Article type
Paper

Independent tunable multi-band absorbers based on molybdenum disulfide metasurfaces

J. Wang, X. Wang, Z. Hu, Y. Tang, A. Balmakou, S. Khakhomov and D. Liu, Phys. Chem. Chem. Phys., 2019, 21, 24132
DOI: 10.1039/C9CP05046A

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