Abstract
Abstract
Dirac semimetal (DSM) coding metasurfaces enable switchable beam control in the terahertz (THz) communication field, thereby providing additional options for the regulation of electromagnetic waves. This study proposes a new structure based on a DSM THz coding metasurface. By adjusting the DSM size, a coding metasurface containing eight units is constructed to realize 3-bit coding. Simultaneously, by adjusting the DSM Fermi level (E
F
), the relative phase delay of adjacent units is controlled, resulting in a switchable coding metasurface. Using specific coding arrangements, multi-functions, such as beam deflection, beam splitting, vortex beams, and vortex beams with adjustable deflection angles can be controlled. Furthermore, a reduce radar cross-section (by approximately 13 dB at an operating frequency of 1.05 THz), is achieved. This study provides novel concepts and methods for metamaterials in the fields of communication and radar.
Funder
Qingchuang Science and Technology Plan of Shandong Universities
National Natural Science Foundation of China
Medical Special Cultivation Project of Anhui University of Science and Technology
Natural Science Foundation of Shandong Province
Special Funding of the Taishan Scholar Project
National Key Research and Development Program of China