Controlling near-field coupling for switchable metamaterial between absorption and polarization-conversion functions

Nguyen Van Ngoc, Le Van Long, Dinh Ngoc Dzung, Tran Van Huynh, Nguyen Thi Mai, Bui Son Tung, Bui Xuan Khuyen, Vu Dinh Lam
Author affiliations

Authors

  • Nguyen Van Ngoc Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Le Van Long Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Dinh Ngoc Dzung Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Tran Van Huynh University of Fire Prevention and Fighting, Ha Noi, Viet Nam
  • Nguyen Thi Mai Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Bui Son Tung Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Bui Xuan Khuyen Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
  • Vu Dinh Lam Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/16900

Keywords:

Metamaterials, polarization conversion, perfect absorption

Abstract

In this paper, a multifunctional metamaterial (MM) structure capable of performing as a polarization converter and absorber is proposed. By using DC bias voltage to control the capacitor of the integrated varactor, the near-field coupling in our structure can be manipulated to flexibly switch between polarization conversion (PC) mode and perfect absorption (PA) mode. The numerical simulation results show that in PC mode the polarization conversion ratio exceeds 90 % at 4 GHz, while the dual-band absorption is observed in PA mode with a value close to 90 % at 3.5 and 5.5 GHz. In addition, we also reduce the geometric sizes of the proposed structure to further examine its performance in the THz frequency range. Owing to its excellent characteristics in both PA and PC modes, the proposed hybrid MM structure is promising to apply in many fields such as radar, remote sensing, and satellite.

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Published

22-08-2023

How to Cite

[1]
N. V. Ngoc, “Controlling near-field coupling for switchable metamaterial between absorption and polarization-conversion functions”, Vietnam J. Sci. Technol., vol. 61, no. 5, pp. 819–829, Aug. 2023.

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Section

Materials

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