Research and design two-dimensional metamaterials absorber operating in the THz frequency region and applications in refractive index sensor

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Authors

  • Tran Van Huynh (Corresponding Author) University of Fire Prevention and Fighting
  • Vu Dinh Lam Graduate University of Science and Technology, Vietnam Academy of Science and Technology
  • Le Thi Hong Hiep Graduate University of Science and Technology, Vietnam Academy of Science and Technology
  • Nguyen Thanh Tung Institute of Materials Science, Vietnam Academy of Science and Technology

DOI:

https://doi.org/10.54939/1859-1043.j.mst.78.2022.140-150

Keywords:

THz; metamaterials; Absorbs two-dimensional electromagnetic waves; Refractive index sensor.

Abstract

Metamaterials absorbers (MMA) are typically designed with resonators, a continuous metal plane, and a sandwiched dielectric layer. The absorption is based on losses in the dielectric layer caused by magnetic resonances. Such MMAs only allow the absorption of electromagnetic waves in the incoming direction, the electromagnetic wave is completely reflected in the opposite direction, and outside the absorption frequency region, the electromagnetic wave is also almost completely reflected. In this work, we propose an MMA structure that does not use the continuous metal plane, using Gold metal-disk pair resonators instead. MMA is designed for high absorption efficiency at a resonant frequency by overlapping magnetic and electric resonances. Simulation results show that MMA can achieve absorption efficiency up to 98% at 2.15 THz. Because there is no metal plane, MMA still allows transmission of electromagnetic waves outside the absorption frequency region, this property makes MMA more flexible and effective in THz devices.

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Published

27-04-2022

How to Cite

Trần Văn Huỳnh, V. Đình L. Vu, Lê Thị Hồng Hiệp, and Nguyễn Thanh Tùng. “Research and Design Two-Dimensional Metamaterials Absorber Operating in the THz Frequency Region and Applications in Refractive Index Sensor”. Journal of Military Science and Technology, no. 78, Apr. 2022, pp. 140-5, doi:10.54939/1859-1043.j.mst.78.2022.140-150.

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Section

Research Articles